Sonny William Williams (born 3 August 1985) is a former professional rugby league and rugby union player from New Zealand.

He is one of just 21 players to have won the Rugby World Cup twice, and he is only the second person to represent New Zealand in rugby union after first representing the country in rugby league.

Williams subsequently stated that the “driving element” in his desire to play professional rugby league was to “buy my mother a house” while recalling his difficult family history.

Sonny Bill Williams Siblings

Sonny Bill Williams has three siblings. His elder brother, John Arthur Williams, and his twin sisters Niall Williams and Denise Williams are his siblings.

Meet Niall Williams, John Arthur Williams, and Denise Williams, The Siblings of Sonny Bill Williams

Sonny William Williams (born 3 August 1985) is a former professional rugby league and rugby union player from New Zealand.

He was born into a family of 5; his mother, his father, and his three siblings. John Arthur was born before he was born. John Arthur is therefore an elder brother to him (Sonny Bill Williams).

After his birth, he welcomed his other two siblings, Niall Williams and Denise Williams. Niall Williams and Denise Williams are his twin sibling sisters.