I believe I gathered the following from a young school teacher surnamed
Nahuwael in Lateri in 1965. --Chaumont Devin.

Nusa Laut and Ambelau were originally one land.  There were two brothers
and a bread-fruit tree.  The younger brother gathered the fruit with a
pole.  The elder brother became jealous and they quarreled.  The younger
brother threatened to leave.

One night there was a terrible thunderstorm and  the island was broken
apart.  The part that broke away was cast up near Buru, and is now called
Ambelau.  When the older brother arose next morning his younger brother
was gone, so he knew what must have happened.

Men from Ambelau must call men from Nusalaut older brother to this day,
even though the man from Ambelau be old and the one from Nusa Laut a mere
child.

The languages of Nusa Laut and Ambelau are not alike.  The language of
Nusalaut is the same as that of Seram.