Hi emeline i am sorry for the late reply. I just saw this post um i know of your family because i am friends with Si'i on bebo. Her grandma is Meletonga Latuselu. Well this is what i know about the Latuselu connection.
Penisimani Latuselu m. Naulongo'akau and had:
1. Sione Latuselu
2. Tiliti Latuselu
3. Mele Muimui
4. Ilaise Latuselu

Your line must come from one of the men Sione or Tiliti.
I have the whole copy of the family tree i can give you.
Um are you related to James Cocker?? Because he gave me all the information......

Ofa Lahi Atu Emeline
Hopefully here from you soon
Sekope