The Yalukit-willam were part of the Bunurong , a language group of six clans along the coast from the Werribee River , to the Mornington Peninsula , Western Port Bay and Wilsons Promontory . The Yalukit-willam were one clan in a language group known as the Bunurong , which included six clans along the coast from the Werribee River , across the Mornington Peninsula , Western Port Bay to Wilsons Promontory .