Schebeck (2001:47) says that Manydjikay (N116.P) comprises Birrkili N116.C, Wangurri N134, Walamangu N79, Wobulgarra N88, Guyamirrilili N103, Golpa N130 and possibly Waramiri N131. Warner (1937) says that Mandjikai (meaning 'sand fly') is a people (phratry) name, and the corresponding language name is Wangurri (meaning 'fresh water'). He does also mention, though, that 'the Warumeri, Wangurri, Wulkara, and Gwiyamil all call themselves Man-dji-kai (sand fly), supposedly the general name for their several languages. Although there is a considerable dialectic variation among the clans within this group, each claiming a distinct language for itself, they all insist that these languages are similar, and distinct and separate from those of all other clans.' (Warner 1937:34). According to Keen (2007 p.c.), Manydjikay (N116.P) means 'sand-fly' and refers to a string of coastal Yirritja moiety ba:purru, but he does not think Birrkili or Warramiri belonged. The Yolng Matha dictionary says 'mandjikay: sandfly--totem for Wangurri clan (not for everyday speech)'. Based on the information available, Mandjikai is unlikely to be a language name. Accordingly it is not included as a language heading in the Thesaurus.
Greatorex, John. 2014. Yolngu Matha Dictionary http://yolngudictionary.cdu.edu.au/
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).