Means “rose field” from Dutch roos “rose” and veld “field”. This was the surname of American presidents Theodore Roosevelt (1858-1919) and Franklin D. Roosevelt (1882-1945).
From the names of places like Ronco or Ronchi, quite common in northern Italy, derived from ronco meaning “cleared land, terraced land”. It was the surname of Angelo Giuseppe Roncalli (1881-1963), the pope John XXIII.