He was Rembrandt's eldest brother. Also Titian's. And Rubens'. Angelica Kauffman was his sister, as were Rosalba Carriera and Sophonisba Angusciola. Another brother was Charles Linnaeus, another Benjamin Franklin. He was himself Raphaelle, the eldest surviving son of Charles Willson Peale, a prominent Philadelphia citizen and something of an eccentric. A painter and naturalist,a friend of Benjamin Rush, and an ardent advocate of temperance and diet ("waterand simple foods," including soups, boiled fish and meat, fruit, vegetables), Charles Willson Peale named each of his children for a scientist or painter (except the youngest, who was named for her mother, Peale's second wife) and then expected them to emulate, if not, indeed, surpass their namesakes. Raphaelle was the greatest of them all but was in his father's eyes a miserable failure, personally and professionally.
Southgate MT. Still Life—Strawberries, Nuts, & c.. JAMA. 1999;282(16):1502. doi:10-1001/pubs.JAMA-ISSN-0098-7484-282-16-jcs90037