What does the name Tamsin mean? The meaning of the name Tamsin is Twin. The origin of the name Tamsin is English. This is the culture in which the name originated, or in the case of a word, the language.
Alternate spellings: Tamzin
People who like the name Tamsin also like: Charlotte
, Violet Declan
Name Notes: Tamsin Greig, actress. Tamzin Merchant, actress.