Jill Masefield McDonald (née Hammond; 30 October 1927 – 2 January 1982) was a New-Zealand-born children's writer and illustrator, working in the United Kingdom from the mid-1960s.
Her father was Reginald Bedford Hammond, a distant cousin of John Masefield.
She initially trained as an architect, but turned to illustration following her marriage, becoming art editor of the New Zealand School Journal.
[1] In addition to the cover designs,[5] her contributions included a regular column in which Odway, a philosophical dog, invited responses from readers.
In McDonald's Times obituary, Kaye Webb, the editor of Puffin Books wrote of her work:everyone who knows it has been captivated not only by her brilliant use of colour and unique style, but the way each sure, strong line seems to impose a very individual and secret humour.