According to Beaufort sources, any oak tree that has grown until its limbs touch the ground is an angel oak. Here is a very fine Beaufort specimen obviously cherished and accommodated by the people who are its custodians. (I won't say owners. Owners of the house come and go. The oak remains.)
The granddaddy of all angel oaks is the one that deserves capital letters, Angel Oak, and it lives on Johns Island near Charleston. (It is thought to be 1500 years old and one of the oldest living organisms east of the Mississippi River.)
These oaks have weathered hurricanes and floods, witnessed centuries of human cares and concerns, the generations passing beneath their limbs. All trees have their own energy, personality, if you will. These trees have wisdom.