This is a little tricky for some families to find their family deity. You might have heard of the guardian angels who watches over you, this is a similar concept, Family deities or home deity or kula deivam or kula devata are but your ancestors with mystical powers who watches over your family and protects you from harm and other negative forces. Family deity can be a God or Goddess. There is a custom in Hinduism where some families won't start new ventures without seeking the blessings of their family deity and their is a belief even the God of death must seek permission from the family deity before proceeding with their task. You can find your family deity by simply asking the senior members of your family or relatives or from old photos and documents. One of the best ways to find them is to find your native place or village, where your ancestors lived 100 - 200 years back and this involves a thorough investigation from your end. Once the place is found, go there and check with the locals and they will be able give you the right directions Muneshwara Swamy is one of the home deities in India, others being Karrupu Swamy, Sangali Karuppan Swamy, Kukke Subramanya Swamy, Yellamma Devi Amma, Mookuthi Amma etc. There are a lot of family deities and they are different for each family or clan and every deity has temple dedicated to them.