The only representative from Southland was among the 42 New Zealand athletes who competed at the event in Germany last month and she exceeded her goals.
Williams claimed not just a gold, but also two silvers and a bronze medal in the competition.
She said she was pleased with her achievements.
"I’m feeling overwhelmed [with the welcoming party] but very happy and proud."
Coach Sonia Manaena has been working with her for the last eight years.
Manaena defined the experience as life-changing for the athlete and said it was rewarding to see her medals after such hard work.
"That was her dream.
"Three years ago, she said to me: ‘Coach, I would like to go into the world like you and I have a dream. I’d love to win a gold medal’ — and she has."