Yasmin Khan's grandfather was the second husband of Umbreen, the father of Najia Khan and the grandfather of Yaz and Sonya.
Like his wife, he was a Muslim, whereas Umbreen's first husband Prem had been a Hindu. He took Umbreen out dancing every Wendsday. (TV: Demons of the Punjab)
When he died, Najia said that Yasmin carried him in her heart. (PROSE: The Good Doctor)