monenne on Family Tree Circles

I am looking for any information on my great great great grandmother Mariana Kahupo who I know had 4 childern her youngest being my great great grandmother Elizabeth who married Willoughby Brassey.
I do have a family tree with a lot of family on it that I don't no but it stops at Mariana as until to day I did not no her surname. I also have a photo copy of a photo of either Mariana or her daughter Elizabeth. PLEASE HELP