Isidore Gluckstein
{{Short description|British businessman (1851–1920)}}
File:Isidore Gluckstein in the 1880s.jpg
Isidore Gluckstein (1851–1920) was a director of Salmon & Gluckstein tobacco merchants, and one of the founders of J. Lyons and Co., a restaurant chain, food manufacturing, and hotel conglomerate created in 1884 that dominated British mass-catering in the first half of the twentieth century.{{cite book|author1=W. Rubinstein|author2=Michael A. Jolles|title=The Palgrave Dictionary of Anglo-Jewish History|url=https://books.google.com/books?id=spOxzrifZjcC&pg=PT657|accessdate=25 November 2016|date=27 January 2011|publisher=Palgrave Macmillan UK|isbn=978-0-230-30466-6|page=657}}{{cite book | last=Harding | first=Thomas | title=Legacy: One Family, a Cup of Tea and the Company that Took On the World | publisher=Random House | date=2019 | isbn=978-1-4735-3760-6}}
Isidore Gluckstein was the son of Samuel Gluckstein, the founder of Salmon & Gluckstein.
He married Rose Cohen (1851–1908). Among their children were:
- Sir Samuel Gluckstein (1880–1958)
- Lena Gluckstein, who married Harry Salmon
- Major Montague Isidore Gluckstein OBE (1886–1958)