Watchful or alert
Cayci is a modern phonetic spelling of the Irish surname Casey. It is derived from the Gaelic 'O Cathasaigh', which means descendant of Cathasach, a personal name signifying vigilance or alertness.
Less common today
Cayci isn't in the latest US Top 1000. It last peaked at #9,147 in 1993.
US births per 5-year period, 1990βpresent (SSA data).