Rick is a nickname of Alaric, Broderick, Cedric, Cerek, Derek, Edric, Emrick, Enrico,
Enrique, Eric, Federico, Frederick, Henrik, Kendrick, Maverick, Orrick, Patrick, Ricardo, Richard, Richmond, Richter, Ricky, Roderick, Tarique, Ulric, Warick, and Yorick.
All of these have Rick in them, Found them online.