ISOLDA: Old English for "fair." Relatives: Isolde, Yseult.
ISRAEL: Hebrew for "wrestled with God." The Puritans were fond of this one. Namesakes: Israel Horowitz, Israel Putnam.
IVAN: Russian variation of John. Relatives: Ivanna, John, Evan. Namesakes: Ivan Boesky, Ivan the Terrible, Ivanna Trump.
IVY: From the Old English for "vine." Very pretty, due for a comeback. Relatives: Ive, Ives. Namesakes: Saint Ives, Judith Ivey, Charles Ives.