She said Ms Hayward's two daughters, Richelle Morehu, 20, and Sophie Brown, 15, were devastated by the tragedy.
"I can't describe how much to you what a magnificent human being she was.
"A lot of people are hurting, she is a very special, generous and loving person. She always put herself forward to help others.
"The sad thing was that when she was in the United Kingdom she was making a Korowai cloak for her daughter's 21st which is in two weeks' time, and her youngest daughter, her birthday is next week."
The cause of the aneurysm remained a mystery to Ms Hayward's family and friends, and was described as "out of the blue" by Rotarians in England.
Rotary in New Zealand and Britain helped make arrangements to bring Ms Hayward home to Tunohopu Marae in Rotorua where a tangi was to be held today and up to 1000 people expected to attend.
Ms Hayward was Te Kaiwhakarite (manager) of He Waka Matauranga, an organisation that specialised in Maori and Pasifika adult literacy.
"She was such a grassroots community-oriented person," said Mrs Samu.
"Her contribution to Maoridom in New Zealand is that she has helped people change and have choice and freedom in their lives with literacy."
Chalmers Cursley, from the Rotary Club of Amersham that hosted Ms Hayward's group, said she had made a "very big impression" on Rotarians there.
"We were impressed with the friendliness of Toni and her team and their willingness to get involved in things. It was very tragic."