My sister's father is my dad.
My mum's sister is my aunt.
My cousin's father is my uncle.
My mum's mother is my grandma.
My dad's father is my granddad.
My sister's father is my dad.
My mum's sister is my aunt.
My cousin's father is my uncle.
My mum's mother is my grandma.
My dad's father is my granddad.