Scudder
Scully
Scully-faced Butthead
Scuma
Scummy
Scutter
Scuzzface
Scylla
Sea Bisquit
Sea Dog
Seabone Sam
Seabreeze
Seairah
Seal
SeaLab 2021
Seamus
Sean
Seanna
Seanna, Goddess of Water
Search And Destroy
Seargent
Seargent Tibbs (from 101 Dalmations)
Seattle
Sebastian
Sebastian Napolean Bonaparte Bartholomew
Sebastian Napolean Bonaparte Bartholomew MacGillikitty II
Sebastian White Paws
Sebatstion
Sebby
Sebbys