Penn was a ukulele and guitar brand name of the Pennino Music Company. Pennino Music was founded in Los Angeles, California by Jeanette Pennino Banoczi (1922 - 2017) and her first husband Humbert Pennino (1907 - 1955). Jeanette was born Jeannette Bernadette Boulay in Lowell Massachusetts and showed a talent for trumpet playing. In 1940, at the age of 18, Jeanette moved to New York City where she played First Trumpet for the Phil Spitalny All Girl Hour of Charm radio programme until 1945. She decided to relocate to California following a trip to Hollywood to play in the movie "When Johnny Comes Marching Home". She married Humbert Pennino, first trumpet for Arturo Toscanini's NBC Symphony Orchestra and they founded and ran Pennino Music Company, the largest wholesaler of musical instruments on the West Coast. During this period Pennino Music Company used the Penn brand for ukes and guitars. Jeanette and Humbert had 3 children together but Humbert died of cancer in 1955 when their youngest child was only 11 months old. It appears that Penn brand was discontinued around this time.

Jeannette and her sister Lynn continued to run the company. Later Jeanette went to play trumpet with the Ina Ray Hutton All-Girl Band in Las Vegas where she met her second husband, saxophone player Jack Banoczi, in the mid 1960s. Around this time the company moved to Westminster, California and started using the Westminster brand name for Japanese made instruments until the mid 1970s. The couple expanded their business interests,  eventually owning seven radio stations in the Southern California and Las Vegas area. Jeanette & Jack remained married for 50 years until her death in 2017.

Source: Lardy's Ukulele database (12 December 2018)

Source: Jeanette Pennino Banoczi obituary.  Desert Sun. August 19 2017