Meaning and name origin
Barnaby \b(a)-rna-by, bar-naby\ as a boy's name is of Greek and Aramaic origin, and the meaning of Barnaby is "son of consolation". Barnaby is a variant of Barnabas (Greek, Aramaic): Greek form of an Aramaic name. See also Barney and Burnaby.
Barnaby is not a popular first name for males but a very popular surname or last name for all people (#16255 out of 88799, Top 18%) (2000 U.S. Census).
Displayed below is a comparison of the popularity of the boy name Barnaby and its variant forms. The only popular variation form ranked in the Top 1000/100 is Barney. (2014 statistics).