1902 Encycl. Brit. XXV. 249/2Albanian is peculiarly interesting as the only surviving representative of the so-called Thraco-Illyrian group of languages which formed the primitive speech of the peninsula. 
1924 G. Murray Rise Gk. Epic (ed. 3) ii. 40A great movement of Thraco-Phrygian tribes with eastern linguistic affinities. 
1931 Times Lit. Suppl. 12 Feb. 116/4The Thrako-Illyrian stratum which underlies all the races of the Peninsular. 
1946 Priebsch & Collinson GermanLang. (ed. 2) i. 19He places the prehistoric connexions of the Tokharians with the progenitors of Balts, Slavs, Armenians and Thraco-Phrygians in the steppes of South-East Russia between the Dniepr and the Urals. 
1968 D. L. Clarke AnalyticalArchaeol. ix. 391An older, outer ring of non-Urnfield Indo-European areas—Teutonic and Baltic on one hand and Thraco-Phrygian, Greek, and Hittite on another. 
1972 W. B. Lockwood Panorama Indo-Europ.Lang. 172Thraco-Phrygian is the term used to denote a group of languages whose earliest known homeland was South-East Europe. Three languages are distinguished: Thracian, Phrygian and Armenian. 
ORIGIN: from (the same root as) Thracian -o- 
Thraco-
Prefix
- Thracian