On this list, I chose to keep only the brands, not the model names. For example, there were many different "Patrician" models, but all these guitars were sold under the Harmony brand, they appear in Harmony catalogs. Patrician is a model name, not a brand. Same for Sovereign, Monterey, Vogue, etc.

Airline - distributed by Montgomery Wards Alden - distributed by Aldens - (not a brand) Aldens was a catalog distributor. Later Aldens used the Holiday brand. Aloha Armstrong Barclay - distributed by Unity Buying Service Beltone - distributed by Monroe or P&H Biltmore Broman Bruno Buckeye - (1945-) Carelli Columbian - distributed by Selmer UK - (1939) Combo - distributed by Selmer USA - (1975) Concertone - distributed by Montgomery Wards - (1928) Continental Custom Kraft - (1942) Eaton - distributed by Eaton - (not a brand) Eaton's from Canada was a catalog distributor. Esquire - distributed by Selmer Fender Fischer - (or Carl Fischer) Galiano

Galperin Gaylord Global Globe Gretsch Heath or Heathkit - distributed by Heathkit Holiday - distributed by Aldens Jay Johnson Kingston La Scala Lombardi Manhattan - distributed by Selmer - (1938-1940) Marvel Marwin Master Art Minerva - distributed by Eaton's Canada Montgomery Wards - distributed by Montgomery Wards - (not a brand) M. Wards was a catalog distributor. Later M. Wards used the Airline brand. Nobility - distributed by P'Mico Opus - distributed by Harmony - (1974-1975) - Harmony last attempt Orpheum Paramount - (1942)

Prairie Voice Premier Regal Rex Rogers - or A.Rogers Serenader - distributed by B & J Silvertone - distributed by Sears & Roebuck - (1940-1970) Sonata SR Sears & Roebuck - distributed by Sears & Roebuck - (1970-) - Sears did not used the Silvertone brand after 1970 SS Stewart - distributed by B & J Supertone - distributed by Sears & Roebuck - (1914-1940) Suprema - distributed by Eaton's Canada Tone King Truetone - distributed by Western Auto Vega Vibratone Vita - distributed by Harmony - (1928-) Walters - (G.B Walters) Weymann Windsor

Harmony made many guitars sold under others names.
It appears they were never exact copy of the Harmony branded models, but very few changes for many of them (mainly colors). On the other hand some rare models, like the S1446 Silvertone above and its Gibson pickups, did not have equivalent in the Harmony line.

These are the most common brands :

• Supertone then Silvertone (Sears & Roebuck)
• Airline (Montgomery Ward)
• Regal (distributed by Fender in the sixties)
• Barclay (Unity Buying Service)
• Alden (later wear the Holiday brand)
• Heathkit (Heathkit made amps sold as kits)
• Holiday (distributed by Aldens)
• Truetone (Western Auto)