Final answer:
The nerve found on the lateral leg below the knee is the saphenous nerve, a branch from the femoral nerve.
Step-by-step explanation:
The nerve found on the lateral leg below the knee is the saphenous nerve. It is a branch from the femoral nerve, which is part of the sacral plexus. The saphenous nerve innervates the skin and subcutaneous tissue on the medial side of the leg.