My original four dogs had middle names (rhyming ones, even, in case you want a warning before you barf.)

Keito Kai
Lacie Jae
Sadie Mae
Queenie Faye

Then I got into rescue, and had dozens of dogs in and out all the time. They did well to get one reasonable name.

Lacie and Sadie have died, so now only two of the eight have middle names. Well, my husband's dog is registered so I guess his middle name is Inferno. Dante's Inferno.