Likely a modern variant of Keir, meaning dark or black.
Keair is most likely a modern American creative spelling of the Scottish name Keir. It is derived from the Gaelic word 'ciar', which was originally used as a nickname for someone with dark hair or a dark complexion.
Less common today
Keair isn't in the latest US Top 1000. It last peaked at #7,305 in 1998.
US births per 5-year period, 1990–present (SSA data).
