William I de Lancaster
William I was born before 1100 in Lancaster, England.  William I is no longer alive.

 Gundrada de Warenne
Gundrada was born about 1117.  She died after 1166.

 William II de Lancaster
William II was born before 1155.  He died in 1184.

 Avice de Lancastria
Avice was born about 1155 in Cumberland, England.