1) Swedish surname 
Lagergren is a Swedish noble family. Claes Eric Philip Frans Joseph Leo Lagergren (1853–1930) converted to Catholicism in 1880 and became a papal chamberlain in 1884, serving under Pope Leo XIII, Pope Pius X, Pope Benedict XV, and Pope Pius XI. He was conferred the hereditary title of Marquis of Lagergren by Pope Leo XIII in 1889. The title is i...