Elsea likely developed as a variant of Elsie, a diminutive of Elizabeth meaning pledged to God.
Elsea likely developed as a variant of Elsie, a diminutive of Elizabeth, meaning pledged to God. That places it within the long and deeply established royal-classic stream that flows from Hebrew through medieval Christian naming into English diminutives.
What makes Elsea interesting is that it softens the familiar shape of Elsie into something more unusual and airy. It still feels gentle and feminine, but it has a slightly more open, maritime quality in sound. The name manages to be both rooted and light, which gives it a subtle charm.