Roma's change of name (4)

I believe the answer is:

omar

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'name' is the definition.
Both the definition and answer are singular nouns.
Maybe there's a link between them I don't understand?

'roma's change' is the wordplay.
'change' indicates an anagram.
'roma' with letters rearranged gives 'OMAR'.

'of' acts as a link.

Can you help me to learn more?

(Other definitions for omar that I've seen before include "- - Sharif (films)" , "- Khayyam, Persian poet, astronomer and mathematician" , "Arab" , "- Sharif, film actor" , "- Khayyam, Pers. poet" .)

I've seen this clue in the Evening Standard.

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