Hindi kinship terms
In Hindu families in India there is a name (title) for every relationship. In the Hindu Family Tree various titles are used to represent one's family members.
Tree representation
People from Father's side
Per Dada - One's father's father's Father
Per Dadi - One's father's father's Mother
Dada - One's father's father
Dadi - One's father's mother
Papa (Pitahji) - One's father
Chacha - One's father's younger brother
Chachi - One's father's younger brother's wife
Tauji (Bade Papa) - One's father's elder brother
Taiji (Badi Ma) - One's father's elder brother's wife
Bua - One's father's sister
Fufa - One's father's sister's husband
People from Mother's side
Per Nana - One's Mother's Father's Father
Per Nani - One's Mother's Father's Mother
Nana - One's Mother's father
Nani - One's Mother's Mother
Ma - One's mother
Mausi - One's mother's Sister
Mausa - One's mother's Sister's husband
Mama - One's mother's brother
Mami - One's mother's brother's wife
Siblings
Bhai - One's parent's (share at least one parent) Son (your Brother, male sibling)
Behan - One's parent's (share at least one parent) daughter (your Sister, female sibling)
Brother's children
Bhatija - One's Brother's Son
Bhatiji - One's Brother's Daughter
Sister's children
Bhanja - One's Sister's Son
Bhanji - One's Sister's Daughter
Your Family
Main - First form ('I')
Patni - One's wife
Pati -One's Husband
Beta - One's Son
Beti - One's Daughter