Is Badyal a Sikh jatt surname?

Yes, some of those are Sikhs but most population hails from Himachal . Badyal s are Jaats,Ghrithies, Brahmans in Jammu and Haldhars (vahti s ) . They were worshippers of Lord Shiva. Their ancestors were fond of eating ghee, so the name ghirthies used at some places.Eightee five villages are in Himachal, five main villages in Punjab and other scarsely populated Badyal s.