Can anyone identify what miniature line/series this is?

[grodog]

Grenadier had at least one set of Amazons years ago in their post-goldbox Dragon Lords line, but not sure if they're what you're looking for or not: see Grenadier Models: Fantasy Warriors - Amazons

 

[pogre]

Probably not what you are referring to, but Laughing Monk Miniatures makes a line of female monks.

 

[Vyvyan Basterd]

I can't find a set listing, but is this what you're thinking of:

Female Monk Martial Artist