Isobel is the Scottish spelling of Isabel, a medieval Spanish and Occitan form of Elizabeth that means "my God is an oath" or "God is abundance". It is pronounced like Isabel and has a long history in Scotland, where it was borne by queens and noblewomen. In the United States it stays in the shadow of Isabella and Isabelle: Isobel peaked at number 1664 in 2016 and ranks number 2307 in 2025.