Marie Cowan

Most notable as one of the writers and arrangers of the song "Waltzing Matilda" - Banjo Paterson wrote the poem which provided the initial (and most) lyrics for the song.
"Very soon after Paterson sold his rights on 12/01/1903, they were purchased by tea merchant James Inglis, who wanted to use 'Waltzing Matilda' as an advertising jingle for Billy Tea. Inglis did not find any of the existing settings satisfactory and invited Marie Cowan, the wife of one of his managers, to try her hand at it. The melody of Harry Nathan's and Marie Cowan's arrangements are so similar that one is clearly a copy of the other. Marie Cowan made some minor changes to Nathan's tune and changed a few of the lyrics. (The policemen became troopers in verse 3 and the swagman cried, "You'll never take me alive." in verse 4. Cowan repeated the second line of each verse in the corresponding chorus.) She gave the song a simple, brisk, harmonious accompaniment which made it very catchy. Her song, published in 1903, quickly grew in popularity and Cowan's arrangement remains the best-known version of "Waltzing Matilda""-- https://en.wikipedia.org/wiki/Waltzing_Matilda