What Title does the Younger Son Have?

[chornedsnorkack]

In Scotland, all sons would probably be, "Sir [name]," as their father would knight them when they came of age. In England, where only the King could create a knight, they'd probably be lords.

Not even in late 14th century.
Before one of the campaigns of Hundred Years War, John of Gaunt contracted to recruit an army to include a specified numbers of archers, etc. and of knights.
He came up a few knights short of the promised number (100 knights IIRC).
No problem. He personally knighted 7 esquires. Problem solved, contract satisfied. And the esquires he knighted were ever after knights for all intents and purposes.
Edit: tracked down the specific campaign. 1370, to serve in Gascony. Contract was for 80 knights, 216 esquires, 500 archers. As mentioned, 7 of the 80 knights were dubbed specifically to meet the contracted number of 80.