English Meaning: The name Holly is an English baby name. In English the meaning of the name Holly is: From the plant name. Holy. American Meaning: The name Holly is an American baby name. In American the meaning of the name Holly is: From the plant name.Holy. French Meaning: The name Holly is a French baby name. In French the meaning of the name Holly is: Shrub.n American the meaning of the name Holly is: From the plant name. Holy. French Meaning: The name Holly is a French baby name. In French the meaning of the name Holly is: Shrub.