You have a Lesina Ah Lam married to an ULBERG whom is your GGrandfather and he is your mother's Grandfather - correct?
"My mom's g.father was an ULberg married to Lesina Ah lam from Vaigaga." --uso
Do you have years as when this marriage occured?
I have data re Lesina Ah Lam b.abt.1897 of Vaiusu, Upolu, Samoa and her parents are: AH LAM & Sapela ULUGIA.
I can send images re AH LAM/ULUGIA. Can you reciprocate? I also have been researching ULBERG/STOWERS but that is another line. I have an Ulberg descendant who may assist with your query(s), just ask away.