The Venus Rosewater Dish isn’t named after Venus Rosewater nor Venus Williams. It got its name because the goddess Venus is featured on it and it is a dish that holds rosewater. It was custom for royalty and the nobility to have rosewater poured over their hands before meals and the dish caught the drops.
As the British Museum Project explains
The trophy is actually named after the goddess of love Venus who is depicted on the dish along with Sophrosyne and the goddess Minerva. Venus represents love and sexual desire, Sophrosyne represents the spirit of moderation and temperance, and Minerva which was the goddess of poetry, wisdom, medicine and crafts.
Around the rim Minerva presides over the seven liberal arts: grammar, logic, rhetoric, arithmetic, geometry, music and astronomy.