Eichelbaum is a German surname meaning "acorn tree". Notable people with the surname include: Samuel Eichelbaum (1894–1967), Argentine playwright Thomas Eichelbaum (1931–2018), New Zealand jurist and Chief Justice of New Zealand Pearl Leah Eichelbaum (1857-1934) married to Benjamin Wonsal (1857-1935), mother of the four Warner brothers, Harry, Albert, Sam and Jack See also Eichel (disambiguation) German-language surnames