Unknown; possibly a modern variant of Keir or Kiara.
Keaire is a rare modern name with no singular established etymology. It is likely a creative American coinage, potentially blending the Gaelic Keir, meaning 'dark' or 'dusky', with the phonetic suffix -aire, or serving as a variant of the Italian-derived Kiara.
US births per 5-year period, 1990–present (SSA data).