Isobel Marion Dorothea Mackellar OBE was a third-generation Australian. Her Grandparents arrived in Sydney, from Scotland, on the 21st May 1839. She was born on July 1st. 1885, at her parent’s home, Dunara, on Point Piper in Sydney. Her father Charles Kinnaird Mackellar was an MD registered with the NSW government medical board, politician and businessman. Baptized Isobel Marion Dorothea Mackellar on August 8th. 1885, at All Saints, Woollahra.