This responds to Robert DOMJAN's inclusion in
Centenarians in Debretts (Part 3).
According to a Probate search (corroborated in the GRO) he died 5 June 2007.
His wife, Heilwig VON BUDINGEN died 19 August 2007.
Robert Béla DOMJAN was the son of Béla DOMJAN de DOMJANSZEG and Barbara Madeline WADE-PALMER (1907 - 1992), dau of Aubrey Nugent WADE-PALMER and Lady Eleanor Charlotte Augusta DAWSON (1885 - 1974), herself dau of the 3rd Earl of DARTREY and the 24th Baroness DE ROS. As the Barony DE ROS may descend in the female line, he was in remainder to that title.
He m 1956 Heilwig VON BUDINGEN, and with her had issue: a son (who is m twice, with issue by 2nd m). It would appear from Debrett's Online that she was entitled to the title Countess as the dau of Count Gerhart von Büdingen. Someone with experience of the continental peerages may be able to give more information.