She said he had achieved a lot for Ngati Toa Rangatira. He was also descended from Ngati Whakaue, Ngapui, Ngati Kuri and Ngati Ruanui, she said.
Sir Matiu was part of the foreshore and seabed claims, which was what he believed he got his knighthood for, she said.
"We are very proud of what he has achieved and it's good for Maoridom.
"His mother and father would have been very proud of what he has achieved."
Sir Matiu has served the Maori community in health, education, economic development, culture and Treaty of Waitangi resolution.
Since 1989 Sir Matiu has been pivotal in the growth of Te Runanga O Toa Rangatira, the development organisation for the Ngati Toa Rangatira people, of which he is executive director.
He has been principal adviser to the Runanga Council on the tribe's business investments and operations and has led the Runanga's promotion of tribal language, history and traditional customs.
Since 1986 he has been responsible for preparing and leading Ngati Toa's Treaty of Waitangi claim and for developing the post-settlement entity and its organisational structure.
Among his many other roles, he is also a founding member, foundation director and Te Purutanga Mauri of the Maori University Te Wananga O Raukawa.