“Walterus Espec et Adelina uxor eius” founded Kirkham Priory, Yorkshire by undated charter, dated to the reign of King Henry I, witnessed by "…Everardo de Roos et Roberto de Ross, filiis Audelinæ sororis meæ junioris…". "Robertus de Ros" confirmed donations to Rievaulx by "Walteri Espec avunculi mei", for the souls of "…fratris mei Everardi", by undated charter, dated to [1147/53], witnessed by "…Roberto clerico nepote domini Roberti de Ros…Stephano nepote domini Roberti de Ros…Thomas de Ros…". The Red Book of the Exchequer refers to "Robertus de Ros ii m" in Yorkshire and "Robertus de Ros dimidiam marcam" in Warwickshire, Leicestershire in [1161/62].
The 1162/63 Pipe Roll names "Rob de Ross", with no further words and no payment, and on the following line "Euerard de Ross" paying £30/6/8 in Yorkshire. This unusual arrangement of the names, as well as the large payment, suggest that it represents a record of the death of Robert de Ros and the payment by Everard de Ros of the fine for his inheritance.
Robert de Ros’s known wife Sibylle de Valoignes is recorded in a manuscript relating to the foundation of Rievaulz abbey as the mother of his son Everard. Everard is named in the 1162/63 Pipe Roll, apparently having already reached the age of majority. However, these two statements appear mutually incompatible because Sibylle de Valoignes is recorded as having had children by her third marriage which is dated to [1181/82]. The most likely explanation is that the Rievaulx abbey manuscript is incorrect and that Robert’s son Everard was born from an earlier otherwise unrecorded marriage. 1
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In the 3rd Henry II [1157], Robert de Ros paid 1,000 marks of silver to the king for livery of the lands inherited by his mother from her brother, Walter Espec. This Robert was a munificent benefactor to the Knights Templars. He m. Sybell de Valoines (who, after his decease, m. Ralph de Albini) and dying sometime about the middle of the 12th century, was s. by his son, Everard de Ros, a minor. 2
Orthographic variations: DE ROOS, DE ROSS