I saw some of the papers that your grandmother shared with uncle melvin. I dont know if she completed her research I only saw some marriage records and some census.
I did some research on both sides for uncle:
Kaaimaunu side I found:
David Kaluna Kaaiakamnu who married Jennie Nakahili. Found his father who's only name was Kaaiakamanu had acres and acres of land in Hana. I did not go to see what happened to the lands. David Kaluna Kaaiakamanu was a very important man in Hawaii as a hawaiian pastor and as a kahuna lapaau (hawaiian herbs). I found a picture of him at the bishop museum along with uncle melvin mother (rose).
I got his obituary from the newspaper.His daughter is Emili Liloa Kaluna Kaaiakamanu who married Ambrose Kalahauoli Kaua.
What did you need?