Meaning and name origin
Isabelle \i-sa-belle, isab(el)-le\ as a girl's name is of Hebrew origin, and the meaning of Isabelle is "God is my oath". Isabelle is a variant of Elizabeth (Hebrew): can also mean "God's promise", "God's satisfaction" or "God's perfection". Also a variant of Isabel (Hebrew): Spanish variant of Elizabeth.
Isabelle is a very popular first name for females (#611 out of 4276, Top 14%) and also a very popular surname or last name for all people (#17720 out of 88799, Top 20%) (Source: 2000 U.S. Population Census).
Displayed below is the baby name popularity of the name Isabelle for girls. Isabelle reached its highest rank of #79 in the U.S. in 2007 (Source: 2014 Birth Name Statistics).
Displayed below is a comparison of the popularity of the girl name Isabelle and its variant forms. Popular variation forms ranked in the Top 1000/100 are Elizabeth (#14), Isabelle (#96), Isabel (#144), Izabelle, Isabell and Isobel. (Source: 2014 Birth Name Statistics).
Isabelle▲ is also pronounced similarly to Ysabell and Ysabelle. Other suggested similar baby names are Isabela▼, Isabella▲, Isobella and Izabella▲. These names tend to be less commonly used than Isabelle.