Is this the father of Sarah Markowitz, first husband of Goldie Schwartz?! Perhaps he died btw 1894-1896? (There is a Joseph Schwartz b. 1896, son of Emanuel Schwartz (pretty sure he is Goldie's son, though his father's name on his death cert is Jacob, not Joseph).)
Not in Pgh Jewish cemetery db. Not in early Hstd deaths.
Update: Had her father's name as Yosef in the tree... must've gotten that from her matzevah. (Yes.)