Chart 1     [† means all children believed found, ‡ means death is computed at 112 years]

Couwenhoven, Cobatje (b:1749)(d:)
. . . . .Van Mater, Eleanor (b:1781)(d:1851)[with: Van Mater, Cyrenius]
. . . . .Van Mater, Peter (b:1786)(d:1870)[with: Van Mater, Cyrenius]
. . . . . . . . . .Van Mater, John (b:1816)(d:1881)[with: Baizley, Lavina]
. . . . . . . . . . . . . . .Van Mater, George (b:1836-1837)(d:)[with: (unknown), Mary]
. . . . . . . . . .Van Mater, Levina B (b:1828-1829)(d:1855)[with: Baizley, Lavina]
. . . . . . . . . . . . . . .Burtis, William Albert (b:1855)(d:1918)[with: Burtis, William Henry]
. . . . . . . . . . . . . . . . . . . .Burtis, (baby) (b:1887-1900)(d:1887-1900)[with: Lomas, Elizabeth Minerva (Eliza)]
. . . . . . . . . . . . . . . . . . . .Burtis, Guilette (b:1887)(d:1946)[with: Lomas, Elizabeth Minerva (Eliza)]
. . . . . . . . . . . . . . . . . . . . . . . . .Hilgreen, William Joseph (b:1906)(d:1962)[with: Hilgreen, Herbert Arthur] ==> Chart 2 [P 1]
. . . . . . . . . . . . . . . . . . . . . . . . .Hilgreen, Anna Estelle (b:1908)(d:1988)[with: Hilgreen, Herbert Arthur] ==> Chart 3 [P 1]
. . . . . . . . . . . . . . . . . . . . . . . . .Hilgreen, Mildred G (b:1911-1912)(d:1939)[with: Hilgreen, Herbert Arthur]
. . . . . . . . . . . . . . . . . . . . . . . . .Hilgreen, Mamie M (b:1913)(d:1913)[with: Hilgreen, Herbert Arthur]
. . . . . . . . . . . . . . . . . . . . . . . . .Hilgreen, Herbert John (b:1916)(d:1975)[with: Hilgreen, Herbert Arthur]
. . . . . . . . . . . . . . . . . . . . . . . . .<<No Children Found>>[with: Rehfus, Henry]
. . . . . . . . . . . . . . . . . . . .Burtis, Edna Elizabeth (b:1888)(d:1971)[with: Lomas, Elizabeth Minerva (Eliza)]
. . . . . . . . . . . . . . . . . . . . . . . . .Oakes, Frances Edna (b:1910)(d:1986)[with: Oakes, Ralston Washington] ==> Chart 4 [P 2]
. . . . . . . . . . . . . . . . . . . . . . . . .Oakes, George Milton (b:1913)(d:1990)[with: Oakes, Ralston Washington]
. . . . . . . . . . . . . . . . . . . . . . . . .Oakes, Winifred Mae (b:1915)(d:1991)[with: Oakes, Ralston Washington] ==> Chart 5 [P 2]
. . . . . . . . . . . . . . . . . . . . . . . . .Oakes, Edith Adele (b:1922)(d:1926)[with: Oakes, Ralston Washington]
. . . . . . . . . . . . . . . . . . . . . . . . .Oakes, Esther (b:1922)(d:1995)[with: Oakes, Ralston Washington] ==> Chart 6 [P 2]
. . . . . . . . . . . . . . . . . . . .Burtis, Milton Lomas (b:1892)(d:1918)[with: Lomas, Elizabeth Minerva (Eliza)]
. . . . . . . . . . . . . . . . . . . . . . . . .Burtis, George E (b:1917)(d:1999)[with: Grinrod, Betsy Rosaland] ==> Chart 7 [P 2]
. . . . . . . . . . . . . . . . . . . . . . . . .Burtis, Thomas (b:1918)(d:1919)[with: Grinrod, Betsy Rosaland]†
. . . . . . . . . . . . . . . . . . . .Burtis, Stella (b:1895)(d:1895-1905)[with: Lomas, Elizabeth Minerva (Eliza)]
. . . . . . . . . . . . . . . . . . . .Burtis, Clarence Edger (b:1897)(d:1934)[with: Lomas, Elizabeth Minerva (Eliza)]
. . . . . . . . . . . . . . . . . . . .Burtis, Irene E (b:1900)(d:1998)[with: Lomas, Elizabeth Minerva (Eliza)]
. . . . . . . . . . . . . . . . . . . . . . . . .Beisiegel, Irene Margaret (b:1920)(d:1969)[with: Beisiegel, Martin Henry] ==> Chart 8 [P 2]
. . . . . . . . . . . . . . . . . . . . . . . . .Beisiegel, Florence E (b:1921)(d:2011)[with: Beisiegel, Martin Henry] ==> Chart 9 [P 2]
. . . . . . . . . . . . . . . . . . . . . . . . .Beisiegel, Robert Andrew (Bike) (b:1923)(d:1987)[with: Beisiegel, Martin Henry]† ==> Chart 10 [P 2]
. . . . . . . . . . . . . . . . . . . . . . . . .<<No Children Found>>[with: Raymond, William E]
. . . . . . . . . . . . . . . . . . . .Burtis, Viola (b:1903)(d:1903-1905)[with: Lomas, Elizabeth Minerva (Eliza)]
. . . . . . . . . . . . . . . . . . . .Burtis, Harold C (b:1906-1907)(d:1907)[with: Lomas, Elizabeth Minerva (Eliza)]
. . . . . . . . . . . . . . . . . . . .Burtis, Ethel (b:1908)(d:1910)[with: Lomas, Elizabeth Minerva (Eliza)]
. . . . . . . . . .Van Mater, Mary Ann (b:)(d:)[with: Baizley, Lavina]
. . . . . . . . . . . . . . .<<No Children Found>>[with: Miller, Samuel B]
. . . . .Van Mater, William (b:)(d:)[with: Van Mater, Cyrenius]
. . . . .Van Mater, Anna (b:)(d:)[with: Van Mater, Cyrenius]
. . . . .Van Mater, Jacob (b:)(d:)[with: Van Mater, Cyrenius]
. . . . .Van Mater, Cornelius (b:)(d:)[with: Van Mater, Cyrenius]
. . . . .Van Mater, Garrett (b:)(d:)[with: Van Mater, Cyrenius]
. . . . . . . . . .Van Mater, Garrett (b:)(d:)[with: (unknown), (unknown)]
. . . . . . . . . .Van Mater, Eliza Ann (b:)(d:)[with: (unknown), (unknown)]
. . . . . . . . . . . . . . .<<No Children Found>>[with: Waldron, James]
. . . . . . . . . .Van Mater, Levina (b:)(d:)[with: (unknown), (unknown)]
. . . . . . . . . . . . . . .<<No Children Found>>[with: Reed, David]
. . . . .Van Mater, Elizabeth (b:)(d:)[with: Van Mater, Cyrenius]
. . . . .Van Mater, Mary (b:)(d:)[with: Van Mater, Cyrenius]
. . . . .Van Mater, Catherine (b:)(d:)[with: Van Mater, Cyrenius]
. . . . .Van Mater, Sarah (b:)(d:)[with: Van Mater, Cyrenius]
. . . . .Van Mater, John C (b:)(d:)[with: Van Mater, Cyrenius]

Chart 2     Couwenhoven, Cobatje>>Van Mater, Peter>>Van Mater, Levina B>>Burtis, William Albert>>Burtis, Guilette

Hilgreen, William Joseph (b:1906)(d:1962)
. . . . .Hilgreen, Eugene William (b:1928-1929)(d:)[with: Behuken, Juliana]
. . . . .Hilgreen, William J (b:1930-1940)(d:)[with: Behuken, Juliana]

Chart 3     Couwenhoven, Cobatje>>Van Mater, Peter>>Van Mater, Levina B>>Burtis, William Albert>>Burtis, Guilette

Hilgreen, Anna Estelle (b:1908)(d:1988)
. . . . .Springer, Kenneth (b:1941-1942)(d:)[with: Springer, Herbert W]
. . . . .Springer, John (b:1944-1945)(d:)[with: Springer, Herbert W]
. . . . .<<No Children Found>>[with: Springer, John W]