Euphemia, countess of Dunbar Is currently identified as wife of Patrick, Earl of Dunbar - previously she had been thought to be Euphemia Stewart.
Medlands gives 2 children only, Patrick & Waldeve, but the peerages have more - based on her previous identity. See:
https://www.stirnet.com/genie/data/british/dd/dunbar01.php Retrieved 21 February 2021
*a. Patrick, 5th Earl of Dunbar, Earl of Lothian (b 1152, d 31.12.1232) m1. (1184) Ada (d 1200, dau of William 'the Lion', King of Scots)
**1) Patrick, 6th Earl of Dunbar (d 1248) m. (c1213) Eupheme Stewart (d c1267) [SIC]
*** (A) Patrick, 7th Earl of Dunbar (b c1213, d 24.08.1289) m. (1242) Cecilia (dau of John (Fraser ?))
*** (B) Waldeve of Dunbar (a 1271, rector of Dunbar)
*** (C) Thomas of Dunbar This connection from the house of Dunbar is suggested by research on the Learmonth family.
*** (D) Isabel of Dunbar (a 1269) identified by a contributor (JB, 21.04.06) m1. Roger FitzJohn de Clavering of Clavering, Warkworth and Horsford (d 1249) m2. (before 19.05.1262) Sir Simon Baard (Bayard) (a 1288)
Do we place Thomas and Isabel with Euphemia de Brus or with an unknown partner?