Tolkien's Periodic Table

Barliman Butterbur owned the Prancing Pony for an unknown period of time in the late Third Age. He was fond of Hobbits and had two hobbit employees: Bob, who worked in the stables, and Nob, a servant.
He knew Gandalf very well as he frequently came and stayed at the inn from time to time over the years.

The Master of Lake-town or "The Master" was the original leader of Lake-town when Bilbo Baggins and his companions arrived. He is described as being greedy, but not undeserving of his position in terms of intelligence and charisma.
He was an acquaintance of Bard the Bowman, and the captain of the town archers, allowing him to remain in Lake-town while the Lake-men recovered from their ordeal with Smaug.

Háma was a Man of Rohan and the doorward of the Meduseld and captain of Théoden's guard.
Háma greeted Gandalf, Aragorn, Legolas and Gimli when they arrived to speak with King Théoden. He told the company to leave their weapons behind, by order of Grima Wormtongue, before entering the King's hall.

Háma was present at the Battle of the Hornburg, and died defending the gates of Helm's Deep. He was buried at Helm's Deep after the battle.

Éomer, born in TA 2991, of the House of Eorl, was the son of Éomund, a descendant of Éofor, and of Théodwyn, sister of Théoden King. In TA 3002, when Éomer was eleven, Éomund was slain in battle with Orcs. Théodwyn died of grief shortly afterward. Éomund also had a daughter named Éowyn, Éomer's sister. After they were orphaned Théoden adopted them as his own children.
Éomer became the third Marshal of the Mark, and was a strong leader of Men. He was honored highly and trusted by the king, and was close with his cousin Théodred, son of Théoden who loved him like a brother.

Théodred was a Prince of Rohan, and the only son and heir of King Théoden, who died during the time Théoden was under Saruman's spell.
During the War of the Ring, Prince Théodred was the Second Marshal of Rohan and commanded western Rohan
Théodred was slain by an Orc-man and his body was defended by the marshal Grimbold. His death made his cousin Éomer the heir to the throne of Rohan. Little else is known about him, except that he loved Éomer like a brother, and loved no one more except for Théoden.

Imrahil, also known as Prince Imrahil, was the twenty-second Prince of Dol Amroth. He had two older sisters, Ivriniel and Finduilas. His daughter Lothiriel wedded Éomer, King of Rohan, in the last year of the Third Age.
After the War of the Ring, Prince Imrahil and his nephew Prince Faramir were King Elessar's chief commanders. Imrahil was also part of the Council of Gondor, and remained an adviser of the King.
Prince Imrahil died in the year 34 of the Fourth Age, and was succeed by his eldest son Elphir, who continued the line of Princes.

Faramir was the second son of Denethor II and the younger brother of Boromir. He was the Captain of the Rangers of Ithilien and Captain of the White Tower upon his brother's death.
Faramir was born in the year TA 2983 to Denethor II and Finduilas, daughter of Adrahil of Dol Amroth. The following year, his grandfather Ecthelion II died and his father, Denethor, succeeded him as the Ruling Steward of Gondor.

Faramir was "modest, fair-minded and scrupulously just, and very merciful".

Halbarad was a Dúnadan Ranger of the North, and one of Aragorn's comrades during the weeks leading up to Sauron's final demise. He was among the Rangers who guarded the Shire in the years prior to the War of the Ring.
In response to a message sent to Rivendell by Galadriel, Halbarad led the Grey Company, comprised of 30 Rangers, south to the aid of their kinsman Aragorn.
Halbarad was killed on March 15 3019 at the Battle of the Pelennor Fields.

Aragorn II, son of Arathorn II and Gilraen, also known as Elessar and Strider, was the 16th and last Chieftain of the Dúnedain of the North; later crowned King Elessar Telcontar, the 26th King of Arnor, 35th King of Gondor and first High King of Gondor and Arnor since the short reign of Isildur.
He was a great ranger and warrior, and as Isildur's heir he bore the shards of Narsil, reforged and renamed Andúril, Flame of the West, in the War of the Ring.
Aragorn possessed Elven wisdom due to his childhood in Rivendell with Elrond and also the foresight of the Dúnedain.

Bill Ferny was a Man of Bree and a known agent of Saruman before and during the War of the Ring.
He resided in Bree and was known as an sneering, nefarious character who would sell anything to anyone, including dealings with shady travelers from the South, the agents of Saruman and Sauron. Ferny lived near the South-gate of Bree.
In Bree, Merry saw Ferny selling information about the hobbits to the Nazgûl. Ferny may have also let loose the ponies that otherwise could have been used by the hobbits to leave the city.
He supported Saruman's mechanization of the Shire, becoming a watchman at the Brandywine Bridge.

Bard, known also as Bard the Bowman, and less chiefly Bard the First, was a man of Lake-town. Bard was descended from Lord Girion of Dale, whose wife and child had escaped to Lake-town when Smaug ruined Dale and took the Lonely Mountain in TA 2770.
He is the slayer of the dragon Smaug, and the founder and first king of the new Kingdom of Dale. He was succeeded as King of Dale by his son, Bain.

Gamling, sometimes referred to as "Gamling the Old", was a Man of Rohan, and may have been Erkenbrand's lieutenant.
Gamling was from the Westfold, and understood the language of Dunland. He was left in charge of the forces defending Helm's Dike (a fortification across the Deeping-coomb before the stronghold of the Hornburg) by command of Erkenbrand.
King Théoden arrived at Helm's Deep with reinforcements from Edoras on March 3, 3019. As the forces of Isengard approached, Gamling and his men pulled back from Helm's Dike and entered the stronghold of the Hornburg.

Éowyn was a shieldmaiden of Rohan, daughter of Éomund and Theodwyn, younger sister of Éomer and niece of King Théoden. Éowyn stabbed her sword through the Witch-king's head, killing him, and thus fulfilling Glorfindel's prophecy a thousand years earlier at the Battle of Fornost that "not by the hand of man" would the Witch-king fall.
After the War of the Ring, she married Faramir. They settled in Ithilien, where they had at least one son, Elboron, and their grandson was Barahir, who wrote The Tale of Aragorn and Arwen in the Fourth Age. The date of Éowyn's death is nowhere recorded.

Théoden was the seventeenth King of Rohan and last of the Second Line of the royal House of Eorl.
Théoden was the only son of Thengel, and became king after the death of his father in TA 2980. Théoden spoke Sindarin and Westron more often than Rohirric, due to the influence of his father, and spent a part of his youth growing up in the mountain vales of Gondor, his mother's homeland.
His sister Théodwyn lived with him in Edoras, and after she and her husband both died he adopted her children Éomer and Éowyn as his own. He had a son Théodred, whose mother Elfhild died in childbirth.

Angbor was a Man of Gondor and the Lord of Lamedon at the end of the Third Age and beginning of the Fourth Age.
During the last months of the War of the Ring, Angbor's men were defending Linhir against the Corsairs of Umbar when the Grey Company led by Aragorn arrived. Such was the fear inspired by the Army of the Dead that Angbor was the only man who had courage enough to meet with Aragorn, who instructed him to gather his men and ride to the aid of Minas Tirith. It was later mentioned that he and four thousand men arrived at Minas Tirith during the time Aragorn and company left for the Black Gate.

Boromir was a valiant warrior of Gondor for his prowess in combat and skill on the battlefield. He was the eldest son of Denethor II, who was Steward of Gondor during the War of the Ring, and his wife Finduilas. Even the people of Rohan admired him, particularly Éomer. He was the older brother of Faramir.

Boromir won respect even from his enemies: in The Two Towers, Ugluk boasts that it had been the Uruk-hai who "slew the mighty warrior", a clear reference to Boromir.

Bergil was the older son of Beregond of Gondor. A boy of ten at the time of the War of the Ring, he accompanied Peregrin Took when he first arrived in the city of Minas Tirith. Bergil had an uncle named Iorlas, who was the same age as Pippin.
He was one of the few children that were permitted to remain in Minas Tirith when the civilian population was evacuated prior to the assault by Mordor. He guided Peregrin Took throughout the city when he and Gandalf arrived, and they became very good friends in the process.
During the siege of Minas Tirith, Bergil helped the healers of the city as an errand runner.

Isildur was the oldest son of Elendil and brother to Anárion. He and Anárion jointly ruled Gondor in the South, while their father dwelt in the North.
During the War of the Last Alliance, Isildur cut the One Ring from Sauron's hand, but he refused to destroy it. Isildur was later killed by Orcs and the Ring was lost in the Disaster of the Gladden Fields for nearly 2,500 years. His refusal to destroy the Ring allowed Sauron's spirit to endure and ensured that he would remain a threat to Middle-earth for years to come.