Old Norse family moved to NY/Brooklyn

Looking for Family Hansen (or Hanssen). Two sisters who came to Brooklyn NY (Margaret and Grace) Margaret got married and had four sons, the first was born in the year 1914. Her husband was a Brooklyn Long Shore man. I'm told that Margaret was petiet. Possibly her father was named Alfred. In any event her father (before WW1, before the Kaiser) was supposed to be known as the "Dairy king of Norway). I did already look through the Ellis Island records and could not confirm any possibilities. I did learn that Kristiania is now called Oslo. Thank you for any help that you may offer. I was a late child and all my elders have passed. I was bred in south Brooklyn and live in CA now.