Yes. My family's dog (Rags, died in 1993) had a middle name - Dean. It is my father's middle name and my brother's, so it was only natural to give it to Rags too. It is also Sherman's.

However, since Samantha is a girl and mine (not my family's), she got my middle name. Leigh. She knows she's in trouble when she hears, "Samantha Leigh!!!" hehe