Ophiucha
Auror
I do consider all these factors, and indeed tend to cut it down to families, but that was just a general scope to get the idea. As an example: Ambrosio and Antonia are named for characters in The Monk, the immortals are named for characters in The Faerie Queene save the one tied to the dragons, who is named for a character in a Lovecraft story (as are her descendants; different stories for different generations), the human character is named after Dolores Haze, and the other two families are named from The King of Elfland's Daughter and The House on the Borderland.