What does the name Rhoslyn mean? The meaning of the name Rhoslyn is Moor Pool. The origin of the name Rhoslyn is Welsh. This is the culture in which the name originated, or in the case of a word, the language.
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, Alaric Gwendolyn
Name Notes: Welsh place name meaning "moor pool." Also a pseudo-Welsh respelling of Rosalind. Rhoslyn Jones, opera singer.