Daine is of Irish origin, meaning 'little dark one'. It's a unisex name, though more commonly used for females. The name gained popularity due to its use in the fantasy series 'The Immortal Instruments' by Cassandra Clare, where Daine is a powerful character.
The name Daine experienced a notable spike in popularity between 1985 and 1990, with peaks of 13, 14, and 19 births respectively. However, it appears to have declined significantly since the late 1990s, with most years seeing fewer than 10 births and many recent years recording only 5 or 6.