I have found a photo of the gravestone in Lansing MI of Mary A Metzger.Her first marriage was to John Linhoff or Linnhoff in Newark NJ. I She was born Sept 12, 1989 and died Mar 20, 1953.Aaccording to a MI census in 1930, she was aged 20 when she was first married (to Linhoff), which puts the date of this marriage as between Sep 12 1918 and Sept 12 1919. My father is definitely the son of Linhoff and it is possible the 2nd child is his daughter. The 2nd child was born Aug 1921 in MI, which narrows down John Linhoff's death to after Dec 1919 and before August 1921. Does anyone have any info regarding John Linnhoff (poss spelt Linhoff)?