What does Mortimer mean?
Mortimer /mor-ti-mer/ [3 sylls.] as a boys' name is of Old French origin, and the meaning of Mortimer is "dead sea".
From "morte mer". Baronial surname that probably referred to a stagnant lake on the family's lands. First used since the 19th century. Entrepreneur Mortimer Zuckerman.
How popular is Mortimer?
Mortimer is an uncommonly occurring given name for males but a very prominent last name for both adults and children (#5917 out of 150436, Top 4%). (2000 U.S. Census)
Shown below is the baby name popularity of Mortimer for boys. Mortimer reached its peak position of #611 in the U.S. in the 1880s, but is not ranked at the moment. (2014 Birth Statistics)