William III De Warenne

William III was born in 1110.¹   William III's father was William II De Warenne and his mother was Isabel De Vermandois. He had two sisters named Ada and Gundreda Countess of Warwick.  He was the second oldest of the three children. He had two half-brothers and two half-sisters, named Robert "Bossu" De Beaumont (Earl of, Rainald FitzRoy, Isabel and Maud.