Complex sentence: His younger brother was a renowned animal sculptor, Rembrandt Bugatti (1884--1916); his aunt, Luigia Bugatti, was the wife of the painter Giovanni Segantini; and his paternal grandfather, Giovanni Luigi Bugatti, was an architect and sculptor.
Split into simpler sentences: His younger brother was a renowned animal sculptor, Rembrandt Bugatti (1884--1916). His paternal grandfather, Giovanni Luigi Bugatti, was an architect and sculptor.