Modern creation combining elements of Kai and Marion
Keimarion is a contemporary American invention, likely formed by blending the prefix 'Kei-' (often associated with the Hawaiian name Kai, meaning 'sea') with the name Marion. It follows the modern trend of rhythmic, multi-syllabic names ending in '-ion'. Because it is a recent coinage, it does not have a singular traditional etymology.
Less common today
Keimarion isn't in the latest US Top 1000. It last peaked at #8,905 in 2009.
US births per 5-year period, 1990βpresent (SSA data).