Name of German chap going up and down (4)

I believe the answer is:

otto

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'name of german' is the definition.
'otto' can be an answer for 'german' (common German name). I'm not certain of the 'name of' bit.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for otto that I've seen before include "Reversible German" , "Palindromic man's name" , "Italian for eight" , "German king" , "Essential oil from flowers - German boy's name" .)

I've seen this clue in The Times.

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