Yank historian Matthew Barton rewrites a good deal of the above history in two lectures:

STINSON RECORDS: A LOOK AT THE LABEL FROM ITS FOUNDING IN 1939

Edmonton to the East Village: Canadian Ukrainian Folk Music on a NY Label

In the first video Barton allows the Stinson Trading Co. was started by a man named Stinson – who died in 1938 – and in the second video we learn he worked for Columbia Records:

“Charles R. Stinson of the wholesale department of the Columbia Phonograph Co., New York City, is receiving the congratulations of his many friends upon the arrival of a son and heir, Charles R., Jr.. who arrived March 2.”
[Talking Machine World, March 1928, p.109]

“STINSON – On Thursday, March 24, 1938, CHARLES R., aged 48 year, father of Charles R. Jr.; son of Mrs. Elizabeth Stinson and brother of Mary I. And William P. Stinson. Funeral services at the Funeral Home, 180-04 Hillside Ave., Hollis, L.I., on Saturday, March 26, at 2 p.m.”
[Brooklyn Daily Eagle, 25 March 1038, p.13]

Note: Son of Charles P. (c.1861-1916) & Elizabeth Stinson (1864-1943.)

Cautionary note: All of the relations are listed as born in “England” but, the Yanks often swap “English” & “British” around in their vital records. Fwiw: Many, if not most, of the New England and Midwest-American Stinsons claim Irish.