Looking for relatives in Amerca

A relative in Norway is looking for her lost family in America. Erik Frederiksen, born 1854, and his daughter Anne, 1879, left for America, bound for Iowa, and arrived in America 8 July 1904. Sister and brother Elise Eriksen, born 1881, and Martin Eriksen, born 1885, arrived on the ship Angelo on 29 April, 1904. Erik Frederiksen was the father of the other three. They were from Jevnaker in Buskerud. Can anyone help? It is possible that the children also used the last name Frederiksen in America or changed their name. The farm name in Norway was Myrengen. Thanks! Dianne