On Fri, 16 May 1997, Marisa Price wrote:

Um.. no. I believe -ko is a dimutive. Such as -ita in Spanish means "little".
This dimutive is very popular with women's names... such as Rumi-ko, Ma-ko,
Mina-ko, etc.

Actually, the kanji 'ko' that usually appears in female names means
'child;' it could be considered a sort of diminutive, I suppose.

The equivalent kanji in male names (I think) would be 'hiko.' (This is far
less common than -ko, however.)