Whose Mama? Who's Mama?

Going through a family photo album created in the 1990s, which just turned up, I found this small photo. On the reverse, in what looks to my eyes like a European hand, is one word: Mama. 

Whose mama is this? And who is Mama? No other clues are available on the photo and no other photos in the album are similar (nor was it near any old photos). Sadly, it could have been from either side of my family. The face doesn't look familiar at all. I'm going to ask a few cousins to take a look but I don't have much hope. 

This is one reason why I'm interested in Picasa 3.5's new face recognition feature. I haven't tried it yet, but Picasa claims that once I've started tagging photos on my hard drive, it will tag new photos automatically and allow me to filter searches by person. I'm going to give it a try soon to see whether it works just as well with old photos as it does with new photos.

2022 update: In 2016 I connected with UK cousins and learned that this was Anna Hannah Mitav Chazan. Picasa is, alas, no longer supported by parent company Google but I still have it.