resposting since was sent List and not sure if Dana is on the list
The posting on Christian Mortensen had been online for a while before I realized it was about Rømskog. The following information is found in the Rømskog Bygdebok.

Rømskog Bygdebok
Bosetting og næringshistorie
Author-Ulf Grøndahl
Rømskog Kommune
2006

From the Bøen farm, Gard No. 75:
Morten Jørgensen, b. 1775 at Steinby, d. 1849. Parents were Jørgen Mortensen and Ragnhild Olsdatter. Morten married a widow, Kari Ingvaldsdatter Bøen in 1810. He had lived at Flaten, Trosterud and Nes before coming to Bøen in 1810. Their children (as listed in the bygdebok) were:
1. Ingeborg b. 1811
2. Kristian b. 1815 (no marriage listed)
3. Ragnhild b. 1821
4. Jørgen b. 1824
5. Karen b. 1827
Kristian, born in 1813, is not listed.

The only other information about the family on Bøen is -
Jørgen Mortensen b. 1824 - d. 1888 at Bøen, took over the farm from his father Morten - no date. He married, in 1846, Berte Marie Halvorsdatter b. 1815 in Setskog, Høland, Akershus.
Children
1. Markus b. 1848
2. Johan b. 1849 d. 1888
3. Karen Helen b. 1853

On the Steinby farm, Gard No. 71:
Jørgen Mortensen b. 1743, buried 1 Jan 1788
His parents were Morten Brynidsen and Ann Brynildsdatter - no farm.
Jørgen Married Ragnhild Olsdatter Steinby in 1774.
Children
1. Morten b, 1775
2. Ragnhild b. 1777
3. Halvor b. 1779
4. Ole b. 1782
5. Marte b. 1786

Ragnhild's parents and siblings were:
Ole Halvorsen b. ca 1706 d. 1787
Married Ingeborg Bryntesdatter in 1734.
Children
1. Marte b. 1734
2. Ole b. 1737 d. 1750
3. Eric b. 1740
4. Berte b. 1742
5. Brynte b. 1744 d. 1750
6. Halvor b. 1745
7. Ragnhild b. 1750
8. Anne b. 1753
9. Kari b. 1756

Ole Halvorsen's parents and siblings - Steinby
Halvor Andersen b. ca 1683 d. 1755, married ?
Children
1. Ole b. ca 1706 - Steinby
2. Rasmus b. ca 1709 - Tørnby
3. Anders b. 1721 - Haukenes
4. Ingeborg b. ca 1723
5. Sten b. 1725
6. Erik b. 1725 d. 1737
7. Ellen b. 1729 in Høland

Halvor Andersen's parents and siblings in Steinby
Anders Halvorsen b. ca 1663, married ?
Children
1. Halvor b. ca 1683 d. 1755 Steinby
2. Morten b. ca 1702 d. 1769, went to Nybru
3. Halvor
4. Kjell

Anders Halvorsen's parents and siblings -
Halvor Torvaldsen b. ca 1617 d. ca 1675,
his father - Torvald Hallvardsen Øst - Tukken
his grandfather - Hallvard Tørnby
married ?
Children
1. Anders b. ca 1663 Steinby
2. Steffen b. 1664 Nes
3. Oluf b. 1666 Tørnby
4. Gro b. in Trandem
5. (Datter married Kristen Olsen?)

My grandfather was born in Rømskog and because of the similarities in names, I have learned that this is not an easy place to do genealogy.
Joanne