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(Presumably) Ulvi Yücelen, founding 1st violinist
The international code for the major airport in Toronto, Canada
City of origin
Thomas Zehetmair (b. 1961), founding 1st violinist ?
Alexander Zemlinsky (1871–1942), composer
Joseph (Sr.) Zoellner (1862-1950), founding violist
Olive Zorian (1916–65), founding 1st violinist, presumably
City of origin (presumably)
Paul Zukofsky (1943–2017), violinist and conductor
Founding 1st violinist and violist ?
Several quartets in a competition
Any quartet in a premiere or recording for whom there is no information