Halfdan "The Black" of Vestfold
Halfdan "The Black" of was born about 0820.  He died about 0863.

 Ragnhild Sigurdsdottir
Ragnhild was born about 0830.

 Harald I "Haarfager" of Norway
Harald I "Haarfager" of was born about 0850.  He died about 0936.