Jacob married Isabelle Jane Royer on 25 Mar 1866 in Northampton County, PA. Isabelle (daughter of Henry Royer and Catharine Frontz) was born on 25 Nov 1845 in Pennsylvania; died on 9 Feb 1932 in Easton, Northampton County, PA; was buried on 13 Feb 1932 in Easton Heights Cemetery, Easton, Northampton County, PA. [Group Sheet] [Family Chart]

1. Anna Matilda Johnson was born on 17 Mar 1867 in Pennsylvania; died on 25 Aug 1951; was buried in Easton Cemetery, Easton, Northampton County, PA.
2. Harry Kline Johnson was born on 22 May 1868 in Tylersville, Clinton County, PA; died on 18 Apr 1950 in Wilson Borough, Northampton County, PA; was buried on 21 Apr 1950 in Easton Heights Cemetery, Easton, Northampton County, PA.
3. Katie Irene Johnson was born on 21 Sep 1869 in Pennsylvania; died on 24 Mar 1937 in Easton, Northampton County, PA; was buried on 27 Mar 1937 in Easton Heights Cemetery, Easton, Northampton County, PA.
4. Joseph H. Johnson was born about 1871 in Pennsylvania.