Duff MacEth
Duff was born about 1078 in Methil, Fifeshire, Scotland.

 UNKNOWN ?
UNKNOWN was born about 1078 in Scotland.

 Dufugan of Angus
Dufugan of was born about 1094 in Forfar, Angus, Scotland.  He died after 1116.

 Gillimichael MacDuff
Gillimichael was born about 1098 in Methil, Fifeshire, Scotland.  He died before July 1136 in Methil, Fifeshire, Scotland.