People would use these terms in their mother tongue usually, like Hey Bhagwan, Hey Deva, etc.
Mothers' are referred as Maa, Mom, Mummy, Mata, Aai, Baa, Amma, etc. depending on their region, language...
Fathers' are referred as Papa, Baba, Dad, Pappa, Baba, Daaji, Pitaji, etc..
Uncles are referred depending on their relationship
Paternal uncle (father's brother) is Chacha or Kaka (Chachi n Kaki/Kaku Aunts)
Maternal uncle (mothers'brother) is Mama (Mami maternal aunt)
Paternal Aunt & her husband is Bua-Fufaji
Maternal Aunt & her husband is Mausi- Mausaji (sometimes called kaka)
Hope this helps. You can alternatively watch some Indian TV shows to know how these relationships work, there is a name for each relation. 😆 quite complicated but yeah.