You can refer to him as Leonardo or da Vinci. Surnames have four origins:
Patronymics, e.g. Robinson, Williams(on)
Place names, e,g, Chester, London.
Characteristics,(or roles taken in plays) e.g. Short, Reed (red), Bishop.
Occupations, e.g. Smith, Cooper, Tailor.
Da Vinci is just one of those; Italians use a preposition and we don't. So it's the equivalent of Leonard Vinci or Leonard Woking.
Taking dogs on holiday in summer



