Complex sentence: His wife was granted the title of Princess and style of Her Royal Highness, in 1883 during Kalakaua's coronation and his three sons were also granted title of Prince and style of His Highness.
Split into simpler sentences: His wife was granted the title of Princess and style of Her Royal Highness, in 1883 during King Kalākaua's coronation. His three sons were also granted title of Prince and style of His Highness.