I'm not sure if you check this anymore, but I am just starting my search now regarding my family and my past.
From what I know, my grandfather's (Te'o Ualesi Toelupe) mother's name is Leata Asi-Falanaipupu (as it has been spelt in our family tree book). Her husband is Folomalo Toelupe.
I am guessing that Leata is sister's with your grandmother, but I am not 100% sure:P
If you have any further information for me, that would be wonderful! Thank you for your time:)
Michelle Nath, Canada