My current (for fun) legacy has several themes. Female children are named after flowers, so I started with Lily. Later generations got Lavender, Rose, Daisy, Marigold, Nasturtium, Hibiscus, Gardenia, Wisteria and Tulip. Male children are named after weather, which started with Lily having children with Cycl0ne. I've had Hale, Storm and Rayne so far. Animals get named after planets and stars so I've had horses called Jupiter, Venus, Mercury, Pluto and Saturn. Imaginary Friends have three letter names with an X in them: Max, Rex, Lex, Tex. So far they're all boys because I haven't had a lot of male children who need female IFs for future spouses, mainly because I'm playing a Matriarchy and am paranoid about having spares.