Terminal Boardom The vast majority of the grounds in this country took their names from a road or are of the town or city obviously before money was king. Very little originality in that. Brentford's ground took their name from the local brewery - the Griffin being the emblem of Fuller, Smith & Turner I believe.
Pretty sure Griffin Park is named after the mythological Brentford griffin, allegedly seen many times taking flight over the nearby Thames, and that's why Fullers also chose it as their emblem.