Ivan Robert Sydney Cosby (1910-1987) (1910–1987) Parents Dudley Sydney Ashworth Cosby Emily Mabel Gubbins Children Gillian Prudence Cosby Richard Ashworth de Sausmarez Cosby Siblings Dulcie Iris Violet Cosby Irene Mabel Alys Cosby Errold Ashworth Sydney Cosby Eric James Dudley Cosby Partners Valerie de Havilland Carey