Kilmer, of Scottish origin, is an uncommon given name derived from the surname, which is an Anglicized form of the Gaelic Mac Ghille Mhurchadh. It translates to 'son of Gille Mhurchadh,' with Gille meaning 'servant' and Mhurchadh being a form of 'Murdoch.' Historically, Kilmer has been used more frequently as a surname than a first name.
"Kilmer is quite rare, with only two notable years for births: eight babies named Kilmer in 1919 and six in 1997."