The meaning of the name Rosamund is Horse Protection. The origin of the name Rosamund is English. This is the culture in which the name originated, or in the case of a word, the language.
Rosamund is a name of Germanic origin from the elements Hros 'horse' & Mund 'protector'. It was also adopted by the English because it sounded like the Latin phrase "rosa munda" which means "pure rose."