Aidan was originally a pet form of the Irish name Aodh (pronounced 'ee'), the name of the old Celtic god of the sun and fire. The name was borne by numerous early Irish saints, one of whom was noted for his kindness and generosity.

A hot name, though perhaps not in the sense you want for your baby. About 20 times as many boys as girls were named Blaze in one recent year, perhaps because it can be seen as a spelling variation of the classic male saint's name Blaise.

Aiden/Aidan is just beginning to wander into the girls' side of the name popularity list, but it's so huge for boys in all its spellings that it will be a long time before it can be called a unisex name.

Agni is the name of the Hindu god of fire, which might make this a unique name for a child born under a fire sign or with a fiery personality.

This old Persian name was chosen by actress Geena Davis for her daughter. It's an attractive variation on a name that exists in dozens of forms, from Alissa and Eliza to the French Alizee, but you'll forever be explaining how to spell and pronounce this version.

Simple yet unusual (to non-Iranians) is an excellent combination for a name, which the fiery Azar embodies perfectly.