Abraham/Avraham may be viewed either as meaning "father of many" in Hebrew or else as a contraction of Abram/Avram and הָמוֹן (hamon) "many, multitude". The Biblical Abraham was originally named Abram but God changed his name. See also Avram. Abe is a common diminutive of Abraham; other less well-known forms include Bram and Brom.

Characters with the first name Abraham include:

Abraham Buford II, historical Confederate general appearing in Fort Pillow.
Abraham Cantorowicz, politician and minor character in American Empire: The Center Cannot Hold.
Abraham Lincoln, historical President of the United States appearing or being referenced in numerous Turtledove works, and an important POV in How Few Remain.
Bram Stoker, creator of Abraham Van Helsing who appears in "Three Men and a Vampire."
Abraham Van Helsing, fictional vampire hunter created by Bram Stoker, appears in "Three Men and a Vampire."
Abraham Washington, minor fictional character in Settling Accounts: In at the Death.

Characters whose name is Ibrahim, Arabic form of Abraham, include:

Ibrahim (In High Places), a robber and minor character in In High Places.
Ibrahim (Interlibrary Loan), a terrorist in "Interlibrary Loan".
Ibrahim Nuqrashi, fictional medical student, minor character in Colonization: Down to Earth.

Characters with the moniker Abe include:

Old Abe (Atlantis), minor Terranovan character in Opening Atlantis: Avalon.
Abe Jacoby, fictional accountant, minor character in The Man With the Iron Heart.

Other uses of Abraham include:

Abraham Lincoln Batallion (or Brigade), historical military organization featured in The War That Came Early.