For Jains with the surname Duggar / Dugar / Dugad:

• “Duggar / Dugar” itself is the Jain gotra.
• It is a gotra of the Oswal Jain community (mainly from Rajasthan/Marwar).
• Many Dugar/Duggar Jains are Śvetāmbara Oswal by tradition, though some Digambar families also use the same gotra name.

So, if your family is Jain and uses Duggar/Dugar as the family name, your Jain gotra is normally understood as Duggar (Dugar) gotra of Oswal Jains.