I don't think it's good.
Sorry ... I can see the appeal of how it sounds, sort of crisp and soft. It wouldn't shock me to see it used - it's not "that" bad. But to me it seems like it should be GP material.
I personally wouldn't like it, just because I don't generally care for the style (surname). That doesn't make it bad. But I like very few girl names in this style -
Hunter is the only one that comes to mind straightaway.
The dictionary word has connotations (foster child). Not totally negative, but not shiny either. That's the main thing I think makes it less than great.
And the surname has associations, too: Fosters is a beer - "Fosters is Australian for 'beer'!" so the ads said.
Fosters Freeze,
Foster &
Smith,
Foster &
Lloyd - it seems catchy and trademarky.
And it sounds a tiny bit like "faster" ... gets a D- on the 'boom boom test.'
The pleasing sound doesn't compensate for all that. When I add it all up, the score is negative, in my view.
- mirfak