"Great Grandparents were Motu and Siata" --Faapaia
Faaota'ota Pasene? Is the "true" surname: PASENE? Or FAAOTAOTA? Do you know Siata's maiden surname? Is MOTU a title brought with Siata to the marriage? Or do you know the history of family matai titles of MOTU? PASENE?
Per IGI, Fa'aotaota MOTU m. 1942? Laina AH CHONG. Her parents: Ah Chong AH CHONG[China] and Selaina
SEVAO m.1917? It seems as though Laina was named for her mother--or could someone have shortened Selaina?
I encourage you to verify ALL data/records with the originals.
Good Hunting, Soifua,