Isabel is dirived from Spain and means "concecrated to God". Since I'm such a history fanatic, I like to imagine that I was named after the prized line of Spanish queens, who were all named Isabel, through tradition.
My middle name, Maryse (which was actually supposed to be my first name), is Dutch and is an alternative to Mary, or Marie. It's tradition in my family for the female's middle name to be Marie, but my mother (through some insight), decided that I might want to be different.