According to Capell (1963, S33), the Gujangal (S50) people were referred to by Howitt, but nothing is known of the language. Wafer and Lissarrague (2008:108) suspect that Tindale's interpretation of the term Guyangal as 'southerner' (Tindale 1974:199 under Thaua) is based on Howitt's 'Guyangal-Yuin' (1904:81-2) which means 'south Yuin'. Based on the information available, Guyangal is unlikely to be a language name.
Shoal Bay; coast near VIC-NSW border (Oates & Oates 1970:144, Capell 1963).
Speaker numbers were measured differently across the censuses and various other sources listed in AUSTLANG. You are encouraged to refer to the sources.
Speaker numbers for ‘NILS 2004’ and ‘2005 estimate’ come from 'Table F.3: Numbers of speakers of Australian Indigenous languages (various surveys)' in 'Appendix F NILS endangerment and absolute number results' in McConvell, Marmion and McNicol 2005, pages 198-230 (PDF, 2.5MB).