Let's take a look at Marx and Lennon...Melinda Marx and Fred Lennon.
Groucho Marx had three children, and only the youngest daughter, Melinda, is still around. She's been reclusive ever since her acting career evaporated in 1972 with the obscure film "No Deposit No Return." Born August 14, 1946, she's known to Marx fans for a few appearances on "You Bet Your Life," including a pretty complicated Gilbert & Sullivan duet with Dad. Sweet Melinda was a little goddess of gloom in real life, not exactly thrilled with being thrust on stage to sing perfectionist patter songs. She wasn't all that thrilled about Life with Groucho in general, and her mother was not faring well either. This photo shows the kind of dysfunctional family they became...
...a chagrined kid, an alky wife (stepmom Eden) and a grouchy old hubby.
The perk of being Groucho's daughter did seem to perk up Melinda when she was in her teens, and able to score a record deal. She probably had visions of being the next Petula Clark, as her single "East Side of Town" draws an obvious comparison to "Downtown."
Meanwhile, across the pond...
Alfred "Freddie" Lennon was a disappointment to John. As in, "Daddy come home." The seaman who was mostly floating outside of John's orbit suddenly re-emerged when his boy was a huge success. John didn't want much to do with him...especially after Fred got himself a record deal.
John inherited some of his famous nasal voice from "Freddie," that's for sure. On the A-side, co-written by Freddie, he offers an autobiographical apology for his love of sailing (which made him an absentee father and husband).
His label had reason to be optimistic. Back then, The Beatles shared the charts with many middle-of-the-road performers. There was Louis Armstrong doing "Hello Dolly" and Andy Williams with "Moon River," and only a few years earlier Walter Brennan was offering talk-novelties with middle-aged background singers. Here's Fred Lennon and his 3 minutes of fame; the sailor come home from the sea. To cash in on his son.
That's My Life... FREDDIE LENNON
b-side, The Next Time You Feel Important