This online tree, link above, says Jens Otto Petersen, born 07 August 1888 in Vor Frue Parish, Sunds herred, Svendborg amt (definitely our guy) died 22 October 1950 in Sweden and was buried 29 October at Marstal Kirke (Marstal Church). Source for the burial: www.marstallere.dk
He married Hansine Rasmine Hansen. They married 8 Jun 1917 at Marstal Kirke.
Hansine was born 25 October 1897 Marstal landsogn, Ærø herred, Svendborg amt, Denmark.
Their children are Joan, Gunnar, and Svend.
Joan Alice Petersen married Kristian Mathias Karl Fleischer b 1915 and had 3 children: Søren, Jens Otto, and Kaj Kristian.
Gunnar Ejner Petersen married Astrid Mary Raahauge and had 2 children: Jette Raahauge Petersen and Bo Raahauge Petersen.