Who came to Australia in 1600s?

No one. The British colonization of Australia began in 1788, with the arrival of the First Fleet at Botany Bay. Although European explorers like Willem Janszoon and Abel Janszoon Tasman had ventured to the Australian coasts as early as the 17th century, no colonization attempts were made then. The 1600s are outside the scope of the European exploration of Australia.