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 - (1957-1969) Alden - distributed by Aldens - (not a brand) Aldens was a catalog distributor. Later Aldens used the Holiday brand. Aloha Arch-Kraft - distributed by Targ & Dinner - (1938) Armstrong Baldwin - (1968) Barclay - distributed by Unity Buying Service Beltone - distributed by Monroe or P&H Biltmore - distributed by Targ & Dinner - (1938-1950) Bluebird Broman Bronson - distributed by Bronson Music - (ca. 1936-1940) - Bronson Music & Sales corp, from Detroit, Michigan, was a distributor for Harmony branded instruments among others (Regal). Bruno Buckeye - (1942-1955) Carelli Columbian - distributed by Selmer UK - (1939) Combo - distributed by Selmer USA - (1975) Concertone - distributed by Montgomery Wards - (1928) Continental Custom Kraft - (1935-1942 ca) 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 Hamilton - distributed by Whaley, Royce & co. (Toronto) - (1936) Harmony "est. 1892" - (after 1975) - Asian made, Harmony branded guitars Heath or Heathkit - distributed by Heathkit Hilo - (1942) Holiday - distributed by Aldens J.W. Johnson Kingston La Scala Lexington - (1942) Lombardi - (1943) Magnus - (1973) - From the maker of chord organs Manhattan - distributed by Selmer - (1938-1943) Marcia - (1935) Marvel - distributed by Sorkin Music, New York City Marwin - distributed by Tonk Brothers Master Art Metro 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. Mozart - (1938) National (Valco) - (ca. 1935-1968) Nobility - distributed by P'Mico Opus - distributed by Harmony - (1974-1975) - Harmony last attempt Orpheum Paramount - (1942-1975) Prairie Voice

Premier Regal - distributed by Fender Rex Rickenbacker - (1932-1950) - Harmony made the very first guitars electrified by Rickenbacker. Most have the old "Rickenbacher Electro" former spelling nameplate. Some others were made by Kay. Rogers - or A.Rogers Serenader - distributed by B & J - (ca 1935-1946) Silvertone - distributed by Sears & Roebuck - (1940-1970) Sonata SR Sears & Roebuck - distributed by Sears & Roebuck - (1969-) - Sears did not used the Silvertone brand after 1970 SS Maxwell - distributed by Targ & Dinner - (1933-1938) SS Stewart - distributed by B & J Stadium - (ca 1939-1941) Supertone - distributed by Sears & Roebuck - (1914-1940) Suprema - distributed by Eaton's Canada Supro (Valco) - (1936-1968) - bodies by Harmony Tone King Tower - distributed by unknown - (1943-45) Truetone - distributed by Western Auto Tuxedo Vega - bodies by Harmony Vibratone Vita - distributed by Harmony - (1928) - Check the Vita Roy Smeck models under the main Harmony brand Walters - (G.B Walters) Weymann Windsor Wizard - (1942)

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 Silvertone 1446 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)