The name Mortimer reached its peak in 1916, with 91 registrations (ranked #613). It first surfaced in U.S. records in 1880, roughly 36 years before its peak. Since the peak, the name has eased to well outside the top 1,000 (around #12277) today, averaging about 6 new babies per year. Mortimer's usage has held roughly steady recently. Across all years on record, approximately 1,943 American babies have carried this name.