Approximately 150 years ago, my ancestors migrated from Kanchipuram to Salem. My great-grandfather is Kotikannikadhanam Thathacaryar. As my grandfather and father were not made aware of who our kula daivam was, pray clarify.

For all Srivaishavanas, kula daivam is Bhagavan Sriman Narayanan. Alavandar says ‘stoshyAmi naH kuladhanam kuladaivatam tat’.
For Tirumalai Thathacaryar Svami and his lineage, Tirumalai Venkatachalapathy is kula daivam
For the one who has raised this query is from the lineage of Kotikannikadhanam Thathacaryar for whom Kanchipuram Varadaraja Perumal is the kula daivam. Based on this, the questioner can consider that Kanchi Varadaraja Perumal as the kula daivam