The only language data available for Giyabal (D14) are the 8 words in Ridley (1875) under the name Paiamba ... according to Tindale (1974) this is another name for the same language; Mathews describes the Paiamba 'tribe' as a member of the 'Dippil Nation' along with Dippil (Gabi-Gabi E29) Turrubul (Yagara E23), Murrungama (Barunggam D40) and other tribes closely related to the Durubulic and Waka-Kabik groups (Mathews,1898 in Wafer & Lissarrague 2008: 334).
According to Tindale (1974: 168), the Giabal seem to be the people who spoke Paiamba when met by Ridley at Yandiila in October 1855. Oates and Oates (1970:152) report a hand-written record on this language by West. Kite and Wurm (2004: 6) say it is unclear whether this group were Waga-Waga E28 or Bandjalang E12 .Geytenbeek indicates it is not a Bandjalangic E12 variety (in Oates 1975: 213).
Wafer, Jim, and Amanda Lissarrague. 2008. A handbook of Aboriginal languages of New South Wales and the Australian Capital Territory. Nambucca Heads: Muurrbay Aboriginal Language and Culture Co-operative.
Giabal territory went from Ipswich in the east down to Allora and the Main Range in the south, then northwest through Millmerran up to Dalby, and then back trhough Gatton to Ipswich. It is unclear whether this group were Waga-Waga or Bandjalang (Kite and Wurm 2004: 6) Between Allora and about Dalby, east to near Gatton; west to Millmerran (Tindale 1974)
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).