G. Reichenkron (Romanistisches Jahrbuch 1960:11.19-22) rehearses succinctly a number of hypotheses, which I summarize here:
a) Not all Albanian-Rumanian correspondences are loans from Albanian into Rumanian; they may be from Illyrian and Daco-Thracian as sources.
b) "Autochthonous" elements of Rumanian show only in part Illyrian-Thracian-Albanian regularities; in part proto-Romance developments appear.
c) Most Albanian-Rumanian correspondences come from borrowings by Vulgar Latin (as precursor of Rumanian) in Dardania from an Illyrian substrate. Then, we suppose, pre-Rumanian moved north of the Danube and merged with a Daco-Romance dialect, which contained Thracian elements showing correspondences with Armenian (allegedly a sound shift, and certain affixes dealt with in Rom. Jb. 9; for details, see below).
d) Daco-Thracian yields Rumanian < IE *q before eu; < IE *s + front V, and IE *k; -f- < IE *p ( > p').
e) Of the residue of unexplained words, loans from Slavic and Magyar account for many.
f) Some ancient Greek loans are to be reckoned with, even though one would not expect Rumanian to borrow wholesale in areas where other Romance did not.
g) There are also some Germanic loans. Therefore, we must reckon with five IE components: Germanic, Latin, Greek, Dacian, Slavic.
h) We must be prepared for the situation where two unrelated etyma fall phonologically together but continue two meanings, such as OFr. mont 'world, mountain' < mundum, montem; this possibility has too often been overlooked.
Reichenkron's reasoning (Rom. Jb. 1958:9.59-105, esp. 59-62) on the Albanian-Rumanian sound correspondences runs as follows: Such correspondences might reflect either (1) Daco-Thracian to Rumanian, and to Illyrian, which later becomes Albanian; or (2) Illyrian, which later becomes Albanian, to Getian Thracian to Rumanian. On the basis of the assumption of a Thracian sound shift from IE, similar to that in Armenian, Reichenkron follows Gamillscheg's theory that the West Rumanian dialects (i.e., Dardanian and South Danubian) go with Albanian in their loan reflexes, while East Rumanian dialects go with Thracian and show sound-shifted reflexes. Thus