With the growing number of in-laws in my database, I ran into more and more instances where these in-laws were related to each other. For some families, I decided it would be easier to do a bare-bones tree of the ENTIRE family to highlight relations. For many of these families, I discovered links I didn't even know existed.

This is what I would consider VERY PRELIMINARY research. While I tried to make sure the information below is correct, I guarantee that it is not. As always, do your own research (always, always, always).

Other In-Law Pages - Daniels | Epping | Heiligenthal | Kerkman | Ketterhagen | Lois | Robers | Weis |

1 Albert John Koetterhagen (1804-1899)
   + Maria Catharina Ernst (1809-1843)
	2 Anna Gertrude Koetterhagen (1831-1850)
	2 Zackarias Koetterhagen (1833-1925)
	   + Joanna Inkmann (1834-1862)
		3 Two More Ketterhagen Children
	   + Margaret Minus (1849-1868)
		3 One More Ketterhagen Child
	   + Anna Maria Bidding (1852-1932)
		3 John Theodore Koetterhagen(1869-1870)
		3 John F Ketterhagen (1871-1923) | in-law
		    + Elizabeth Busch (1874-1976) | 1st Cousin (2x rem)
			4 - Nine Ketterhagen Children
		3 Bernard Z Katterhagen (1873-1964) | in-law
		    + Anna Marie Busch (1881-1960) | 1st Cousin (2x rem)
			4 - Eleven Ketterhagen Children
		3 Eleven More Ketterhagen Children
	2 Anna Elisabet Ketterhagen (1836-1874)
	2 John Bernard Katterhagen Sr (1838-1907)
	   + Elizabeth Reesman (1844-1893)
		3 John Bernhard Ketterhagen (1862-1943)
		   + Mary Catherine Rother (1863-1941)
			4 Alois Henry Ketterhagen(1887-1939)
			   + Katherine Mary Epping (1890-1969) - see also Epping In-Laws
				5 Alice Catherine Ketterhagen (1913-1987)
				5 Ethel Mary Ketterhagen (1920-1990) | in-law
				   + Robert Francis Robers (1916-2006) | 2nd Cousin (1x rem)
				5 Olive M Ketterhagen (1922-2008)
			4 Lawrence Albert Ketterhagen (1893-1976)
			   + Mary Ann Nelson (1898-????)
				5 Rosemary Ketterhagen (1920-2000) | in-law
				   + Leon Anthony Kerkman (1920-1981) | 2nd Cousin (1x rem) - see also Kerkman In-Laws
		3 Albert Ketterhagen (1865-1943)
		   + Mary Wihelmina Jacobs (1869-1852)
			4 Eleanor Mildred Ketterhagen (1905-1996)
			   + Leon Richter (1907-1975)
		3 Edward Bernard Ketterhagen (1885-1945)
		   + Louise Susan Daniels (1884-1945)
			4 Andrew Martin Ketterhagen (1923-2003) | in-law
			   + Elenor M Nienhaus (1924-1979) | 2nd Cousin (1x rem)
		3 Ten More Ketterhagen Children
	2 Catharina Elisabet Koetterhagen (1841-1841)
	2 Joseph Koetterhagen (1842-1843)
   + Elizabeth Terborg (1812-1865)
	2 Johan Bernard Koetterhagen (1844-1875)
	2 Elizabeth Catherine Koetterhagen (1846-1909)
	2 John Joseph Koetterhagen (1849-1895)
	   + Anna Bidding (1855-1936)
		3 Henry Frederick Ketterhagen (1890-1929)
		   + Elizabeth Kortendick (1890-1924)
			4 Dolores M. Ketterhagen (1924-2016) | in-law
			   + Walter Henry Vos (1922-1980) | 3rd Cousin (1x rem)
	2 Henry Koetterhagen (1851-1913)
	   + Gertrude Willich (1848-1922)
		3 Alex John Ketterhagen (1885-1971)
		   + Caroline R. Cramer (1894-1980)
			4 Elmer Ketterhagen (1923-2005) | in-law
			   + Marjorie Epping (1925-1986) | 2nd Cousin (1x rem)
				5 - Six Ketterhagen Children
		3 Six More Ketterhagen Children
	2 Mary Elisabeth Koetterhagen (1854-1854)
	2 Clara Elizabeth Koetterhagen (1857-1857)