Why did Eric Blair change his name to George Orwell?

Eric Blair (aka - George Orwell) changed his name in 1933 - his new pen name stressed his deep and lifelong affection for the English tradition and countryside - George V was monarch at this time and the River Orwell (located in the County in which he lived) was one of Eric's favorite visiting spots. he was bored of his other name,i mean come on,who likes that name?