Hi Tattooed Monkey,
Good to hear from you and I'm really sorry for the loss of both your grandmas recently.
You say you and your partner would like to include both your grandmas' names in your baby's name, but you don't like your partner's grandma's name, and would prefer not to include it.
This is such a difficult situation and I really sympathise. You want to be fair, but you don't want to give your daughter a name that you don't love!
My personal opinion (and others may disagree!) is that you may upset the family if you honour one grandma without honouring the other. However, is there some other way of honouring your partner's grandma, as you don't like her first name? Do you know her middle name? Or what about her surname or maiden name - or even where she lived or somewhere she had a connection with (Devon, Iona)? As I said in an earlier post, it's now very fashionable to use surnames as first names. Of course that won't work with all names, but lots of surnames are lovely for a little girl - Taylor, Riley, Harley etc - and lots of place names can work well too.
Hope you can find something that works. Best of luck!