This is inspried by Asa's What's in a name?" thread in Wordplay. There he asks for names that are particularly apt, such as the specialist in pain and palliative care, named "Dr. Payne".

In the same manner, what are some redundant names such as:
-Sahara Desert --"sahara" itself is arabic for "desert", I understand.

The term for such a redundancy is on the tip of my tongue. Help!

All I can think of is an internal tautology, or pleonasm.

Following my own odd reasoning, when a single celled organism divides, is that a cytoplasm pleonasm?

years ago when Iworked in a creamery office I met a Marshal from Chicago whose name was Marshall Marshall. What's the name for that?

quidnunc, I'm sure there is a name for that, but have no hope of dragging it ot of whatever braincell it is locked in. I seem to have lost the passkey.