Richard Fitz Roy (natural son of King John), married Rohese, d. 1264/5, daughter of Fulbert of Dover. [Ancestral Roots]
Rose, daughter and heiress of Robert of Dover. [Burke's Peerage]
Note: Rohesia's father could be called Robert, although Ancestral Roots named him Fulbert in two different lines.
Note: CP XIV:87 corrects CP II:127 in renaming her "Rose, daughter of Foubert de Douvres" from her older name "Rohese, daughter of Robert de Dover". This apparently is her latest name. But then CP VIII:518, as corrected by XIV:468, names her "Royce, daughter of Robert de Douvres" (sounds like a Rolls!). Rose/Rohese/Royce?