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Eugène Isaÿe (1858–1931), founding 1st violinist
Eugène Ysaÿe (1858–1931), violinist and composer, founder of the first Quatuor Ysaÿe in 1886
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