My Grandfather Oswald Deakin

My grandfather is called Oswald Buckle Deakin. He went to Oxford University and served in World War two in some sort of administrative post in America. His father was called Arnold Walford Deakin and was a minister in the church of England in various posts; they travelled around a lot. I hope to go further back than this. Just a bit of further information: my mother suggests that they may have decended from some fair folk.