A variant of Kelsey, from an English surname meaning 'ship's island' or 'Cenel's island.'
Keltsey is a variant of Kelsey, from an English surname meaning ship's island or Cenel's island. That gives it a place-based, surname-derived history, the sort of ancestry that many modern given names inherit when family names move into first-name use.
The spelling makes Keltsey feel a bit more distinctive than Kelsey while keeping the same approachable energy. It has a modern unisex quality, but also a familiar English surname cadence. Keltsey sounds balanced, current, and lightly regional, with just enough variation to stand apart from the standard form.