Why was John Wayne nicknamed “Duke”?

Here is the question :

WHY WAS JOHN WAYNE NICKNAMED “DUKE”?

Here is the option for the question :

He was related to royalty
It was his dog’s name
It was his real first name
Nobody knows

The Answer:

And, the answer for the the question is :

It was his dog’s name

Explanation:

[STC0013593]. The origin of John Wayne’s tough moniker is actually quite endearing. The actor’s childhood pet dog was a hound he named Duke. Evidently fond of the moniker, Wayne took it upon himself to be known by it. Big Duke and Little Duke were Wayne and his dog’s nicknames around town. The famous actor carried his childhood moniker into adulthood.