an Englishman's home is his castle

Examples from literature

Then, an Englishman called John Harrison made a new watch with a spring, not a pendulum. 
An Englishman, with a red silk shawl over his head, was sketching the city, while an Arab held an umbrella over him. 
He found her in the Englishman's front room. 
He's there now—waiting to hear that Olivia has married her Englishman, as you might wait to hear that sentence of death on some one you were fond of had been carried out. 
I believe I am held in remembrance in the town as a typical Englishman! 
Several years ago, an Englishman, by the name of Munro, was killed by a tiger in the East Indies.