Dark or black-haired
Derived from the Scottish Gaelic word 'ciar', meaning dark or dusky. It was originally used as a nickname for someone with dark hair or a dark complexion and later evolved into a surname and given name.
About 7 boys were named Keir in 2025.
US births per 5-year period, 1990–present (SSA data).
Founder of the UK Labour Party
Prime Minister of the United Kingdom
American actor known for 2001: A Space Odyssey
Canadian actor known for the series Atypical
Australian-American character actor
