Iago, means "he who supplants". Iago is rarely occurring as a men's name. See also Dago.
Ian, var. Ion, Iain, means "God is gracious". Ian (Top 81%) and Ion (26%) are found often as surnames.
Ib, means "Baal's pledge". Gender-neutral name. Unconventional. Compare Ib, and popular last names Ibay, Ibe, which also begin with Ib-.
Ibrahim, var. Ibraheem, means "father of many". Ibrahim is familiar as a form.
Icarus, var. Ikarus, Ikaros. Unique. Icarus, Ikarus (cf. Hesperus, Florus) end with the favored masculine -rus.
Ichabod, var. Ikavod, Ikabod, means "the glory is gone". Ichabod, Ikabod and Ikavod are seldom found as male names.
Idan, means "era, time". Idan is uncommon as a boys' name. See also Ilan.
Ido, var. Iddo, means "evaporate; to be mighty". Unconventional. Compare Ido, Iddo, and popular last names Odo, Oddo, with the -do suffix.
Idris, means "fiery leader; prophet". Idris is an atypical masculine name, occurring commonly (Top 28%) as a last name. Unisex name.
Ieuan, var. Ifan, Iefan, means "God is gracious". Uncommon. Ieuan, Iefan and Ifan are not found in the US Census.
Ignatius▼, var. Ignaz, Iggie, Inigo, Ignac, Ignatz, Ignace, Inacio, Ignazio, Ignacio▼, Ignacius, .. 1 more. Ignacio is common (Top 36%) as a given name.
Igor, var. Inge, Ingmar, Ingemar. Common surnames. Compare Igor, and last names Begor, Lagor, with the -gor suffix.
Ihab, means "gift". Not Top 1000 name. See also Ib.
Ike▼, means "laughter". Unique. Ike (cf. Pelike, Felike) ends with the familiar masculine-sounding -ke. See also Ikie.
Ilan, var. Ilon, means "tree". Unique. Ilan, like Foillan, Bartalan, ends with the common masculine-sounding -lan.
Ilario, means "cheerful". Unique. Ilario (cf. Mario, Helario) ends with the familiar masculine -ario.
Ilias, var. Ilie, means "Jehovah is God". Not in Top 1000.
Ilya, var. Ilia, Illya, means "Jehovah is God". Ilya, Ilia and Illya were not among 2014's Top names.
Imad, means "support, mainstay". Not in Top 1000. See also Amad.
Immanuel, var. Iman, Imani, Imanuel, Imanoel, Immannuel, means "God is with us". Iman and variants are seldom found as male names.
Imre, var. Imri, Imrie, Imray. Not Top 1000 names.
Ince, means "innocent". Popular last name. Compare Ince, and surnames Hence, Arnce, with the -nce suffix. See also Ingo.
Indio, var. Indyo, Indeeo. Outside Top 1000.
Indra, means "possesses rain". Indra, like Hendra, Vondra, is a common surname with the -ndra suffix.
Ingemar, var. Ing, Ingmar, Ingamar, Ingemur, means "son of Ing". Not Top 1000 names.
Inglebert, var. Ingbert, Ingelbert, means "angel-bright". Rare. Compare Inglebert, Ingbert, Ingelbert, and popular surnames Hiebert, Siebert, with the -bert suffix.
Ingo, means "meadow; lord". Popular last name. Compare Ingo, and surnames Rengo, Zingo, which also end with -ngo. See also Ines.
Ingram, var. Ingrim, Ingrams, Ingraham, Ingrahame, means "raven of peace; raven of Anglia". Ingram, Ingrim, etc. are not in the Top 1000.
Ingvar, var. Ingevar, means "Ing's soldier". Ingvar and Ingevar are rarely used as boys' names.
Inigo. Inigo is a scarce male name, appearing commonly (Top 51%) as a last name. See also Ingo.