People with acquired American citizenship

Margarethe "Grethe" Cammermeyer (born March 24, 1942) is a former Norwegian-American military officer. She served as a colonel in the Washington National Guard and became a gay rights activist.

Ferdinand Kramer (22 January 1898, Frankfurt, Germany – 4 November 1985, Frankfurt) was a German architect and functionalist designer.

Lina Abarbanell (January 3, 1879 – January 6, 1963) was an American soprano who performed in grand and light opera and musical comedy. She made her debut at fourteen as Adele in the operetta DIE FLEDERMAUS, at the Royal Opera House in Berlin. She was first introduced to American theatergoers in 1905 as the soubrette in the Josef Strauss operetta Frühlingsluft (Spring Air). Abarbanell made opera history later that year as Hänsel in The Met's debut production of Engelbert Humperdinck's Hänsel und Gretel. Abarbanell spent the following near thirty years performing on Broadway and at venues across America. After her husband's death in 1934, Abarbanell left the stage, but remained active over virtually the remainder of her life as a Broadway casting director, producer, and stage director.

Philip Murray (May 25, 1886 – November 9, 1952) was a Scottish-born steelworker and an American labor leader. He was the first president of the Steel Workers Organizing Committee (SWOC), the first president of the United Steelworkers of America (USWA), and the longest-serving president of the Congress of Industrial Organizations (CIO).

Hendrik Willem van Loon (January 14, 1882 – March 11, 1944) was a Dutch-American historian, journalist, and children's book author.

Edgar George McIldowie Lansbury (born 12 January 1930) is a British-American retired theatre, film, and television producer.

Vittorio Guido Zucconi (Italian pronunciation: [vitˈtɔːrjo ddzukˈkoːni], August 16, 1944 – May 26, 2019) was an Italian journalist and author. He also had U.S. citizenship.

Bartholomeus Jan "Bart" Bok (April 28, 1906 – August 5, 1983) was a Dutch-American astronomer, teacher, and lecturer. He is best known for his work on the structure and evolution of the Milky Way galaxy, and for the discovery of Bok globules, which are small, densely dark clouds of interstellar gas and dust that can be seen silhouetted against brighter backgrounds. Bok suggested that these globules may be in the process of contracting, before forming into stars.
Bok married fellow astronomer Priscilla Fairfield in 1929, and for the remainder of their lives, the two collaborated so closely on their astronomical work that the Royal Astronomical Society said "from that point on it is difficult and pointless to separate his achievements from hers". The Boks displayed such great mutual enthusiasm for explaining astronomy to the public that The Boston Globe described them in 1936 as "salesmen of the Milky Way".: 44  They worked together on research and co-authored academic papers, and their general interest book The Milky Way went through five editions and was "widely acclaimed as one of the most successful astronomical books ever published".Bok's primary research interest was the structure of our galaxy. When he was asked by the editors of Who's Who in America to submit a statement concerning "Thoughts on My Life", he wrote, "I have been a happy astronomer for the past sixty years, wandering through the highways and byways of our beautiful Milky Way."Bart Bok was an exceedingly popular personality in the field of astronomy, noted for his affability and humor. When asteroid 1983 Bok was named for him and his wife Priscilla, he thanked the International Astronomical Union for giving him "a little plot of land that I can retire to and live on."