GUILLIAUME I de LUXEMBURG
GUILLIAUME I was born in 1081.¹   GUILLIAUME I is no longer alive.¹ 

 LUITGARDE (Mathilde) de NORTHEIM
LUITGARDE (Mathilde) was born after 1087.¹   LUITGARDE (Mathilde) is no longer alive.

 LUITGARDE de LUXEMBURG
LUITGARDE was born about 1120.¹