A familiar name to many (3)

I believe the answer is:

tom

I'm a little stuck... Click here to teach me more about this clue!

'a familiar name' is the definition.
'Tom' can be an answer for 'name'. I'm not certain of the 'a familiar' bit.

'to many' is the wordplay.
'many' becomes 'm' (Roman numeral for a thousand).
'to'+'m'='TOM'

Can you help me to learn more?

(Other definitions for tom that I've seen before include "He is associated with Dick and Harry" , "Male beast" , "Man's name; male cat" , "Boy running off with pig" , "Very small person" .)

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