Dixon (1977, 2002) says that Yidiny Y117, Gunggay Y114, Madjay Y119 and Wanjurr(u) (Y165) are in a dialectal relationship.
The term Yidiny is used by some as a cover term for these dialects.
Documentation on Yidiny Y117 may be relevant. Previously Wanyurr and Madjay were listed together in the Languages Thesaurus (Madyay / Wanyurr Y119).
Mouth of Russell River inland of Babinda, Q (Oates & Oates 1970:207).
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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).