Missy, sissy, hissy, kissy

I call the big one "Bitey"

Ruby, Sapphire, Amethyst, Greg

Jǫrmungandr, Quetzalcōātl, Apep, Tiāmat

Vindow Viper

Alecto, Tisiphone, Megaera, and Bob.

Ivy, Mercedes, Temptress, Crazy Eyes

Victoria, Vienna, Violet, Verity

Vraska, from MTG Gorgons. or you can do scientific nomenclature of different species.

Lessslie

Inky, blinky, pinky and clyde

Scary, Sporty, Baby and Posh. The main head is Ginger.

Skuld, Helja, Gunnr, and Brynhildr

Asterix

Lucy (for Lucifer) (h/t David Wojnarowicz)

Trinity, Sophia, Mallory, and Alyssa

We don't even get a pic!??

Miss Hiss

Curl, twirl, snag, and bangs

Marjorie ? Lauren ? Tulsi?

Legolas is always a good snake name.

Vanna Vipe(r)

There's a Harry Potter story where he had six pet basilisks called Madonna, Kip, Aqua, Marine, Delphi, and Sang. Maybe that's a start. He also had a gaboon viper named Kichaka. And there was a mention in a Roald Dahl book about using a viper for something, but "it must be a vindshield viper". That stayed with me even though I've forgotten the rest.