The heat or the border
In Hawaiian, Kaena can refer to 'the heat' or 'the border/cape.' It is most famously associated with Ka'ena Point, the westernmost tip of the island of Oahu, which is considered a sacred site in Hawaiian mythology.
Less common today
Kaena isn't in the latest US Top 1000. It last peaked at #9,260 in 2004.
US births per 5-year period, 1990βpresent (SSA data).