William (The Seemly) de Sinclair
William, known as The Seemly, was born in 1145 in Rosslyn Castle, Rosslyn, Midlothian, Scotland.¹ 

 Agnes de Dunbar
Agnes was born in 1177 in Dunbar Castle, East Lothian, Scotland.² 

 Early of Rosslyn Henry de Sinclair
Henry was born in 1192 in Rosslyn Castle, Rosslyn, Midlothian, Scotland.¹   He died at the age of 22 in 1214 in Rosslyn Castle, Rosslyn, Midlothian, Scotland.¹