Meaning Keiron is both a Celtic and Gaelic name that share the meaning 'dark-haired one'. It is a spelling variation of Kieran Origin of Keiron Celtic , Irish Popular Middle Names Pronunciation 🔊 Listen Keiron KIH-rahn Similar Names Kyran Kerion Doug Doggie Kiaran Kiaron Kieron Kyron Dougie Keiran Year by Year Popularity of Keiron