Found this message board quite by accident. My family's name is Leon Guerrero/Benavente, and my grandmother Esther (Ester?) Benavente, resides in Dededo.
I believe our family name is Nachâ, and we had a family reunion a few summers ago, on Guam.
Unfortunately, I won't be able to check my email for another week or so, so I will reply back when I am able.