"Many of our researchers believe the "McGriff" name is dervived from McGriffin, McGriffor, McGriffer, McGrigger, McGriffy, etc. The name was probably changed and shortened due to various reasons such as illiteracy (common at that time), heavy accents, and general sloppiness. At that time and place a surname wasn't treated with the same sense of importance or stature that it is today. The census and/or tithetakers (usually vestrymen) were assigned by the parish for the task of going house to house in a specific geographical area to list occupants and collect tithes (taxes), which was usually tobacco to generate and maintain funds for the nearest parish. These people would simply write down the name they think they heard "phonically" from the occupant, or if the occupant wasn't home they wrote down what a neighbor thought his name was, therefore McGriffer became McGiff, McGuffin, McGuffog, McGriger, Megruff, Magiff, etc.
The earliest and closest spelling to "McGriff" is that of a John McGriffer who qualitfied to be a constable in Halifax County in 1754 .The first recorded "McGriff "spelling for now was a land record of John on the borders of Snow Creek, Halifax County in December of 1765. It seems based on records that the consistent spelling of "McGriff"came to be just prior to the Revolutionary War in the early 1770's. But there are numerous variations of our name found well into the 1800's.