Maybe someone with a NEHGS membership could look up the following :
Charles J Weinz d. Boston 1894 vol 447 page 170
Charles Wagelein d. Boston 1894 Vol 447 page 72

August Frederick Wagner of Prussia/Germany married to Frederikka J. ?? of Denmark between 1865-1878 Boston.
August Frederick Wagner was a sailor born July 13, 1846, sometimes Germany, sometimes Prussia. He is listed in the census for Chelsea starting in 1880 with wife Fredricka who was born in Denmark. They have three children at the time who were born in Massachusetts.
He goes by both August and Frederick if someone is willing to look for this marriage.