Ship victory or island of the ships
Celsey is a modern phonetic variant of Kelsey. It likely derives from the Old English surname and place name Ceolsige, combining the elements 'ceol' meaning ship and 'sige' meaning victory.
Less common today
Celsey isn't in the latest US Top 1000. It last peaked at #4,998 in 1994.
US births per 5-year period, 1990βpresent (SSA data).