Ivar the Boneless Ragnarsson of Dublin
Ivar the Boneless Ragnarsson of was born in Norway.  He died in 0873 in Dublin, Ireland.

 Sitric I Halfdansson of Dublin
Sitric I Halfdansson of was born about 0850.  He died in 0896.

 Sichfrith Halfdansson
Sichfrith was born before 0873.