Robert le Vavasour
Robert was born before 1135.  He died after 1187.

 Juliane Ross
Juliane was born before 1135.  She died after 1187.

 Maud le Vavasour
Maud was born before 1150 in Edlington & Newborough, Yorkshire, England.  She died before 1226 in Hazelwood, Yorkshire, England.

 John le Vavasour
John was born about 1187.