You may be looking for Yasmin Kahn's grandfather.

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. (TV: Demons of the Punjab)

When he died, Najia said that Yasmin carried him in her heart. (PROSEThe Good Doctor)