I'm David Yavner's Great Grandson and have some info:
David Yavner:Born 15Mar1865 in Siauliai, Lithuania.Died 31Jan1946 in Boston, MA.Arrived in US 4July1881 and became a citizen 28Oct1893.Married Fannie Rosenberg (daughter of Moshe Rosenberg) born Sept1893 an died 25July1930.Hebrew name was Fruma Shayna.Children:
1. Tobias V:b. 19Apr1887 / d. 11Feb1978 / m. 23Nov1911 to Ella T. Edelstein (b. 14Aug1891 / d. 26Feb1979).Children: Minna, Jeanette, Ruth, Sarah, Samuel, Murray. 2. Harry: b. Dec 1888 / d. 28Dec1973 / m. 5Sept1920 to Celia Edelstein (b. 23Dec1895/ d. 12Feb1981).Children:Bernice, Elaine. 3. Sadie Pauline:b. Dec1889 / d. 8Jan1944 / m. 16Jun1914 to Samuel Small (b. 6Jan1890 / d. 1Feb1938).Children:Mlton, Harry, Edward, Erwin, Pearl. 4. Max: b. 14Dec1892 / d. 28Jun1976 / m. Sara ?.Children: Phyllis. 5. Benjamin F: b. 8Feb1895 / d. 21July1973 / m. Harriet ?.Children:Melvin, Shirley Pearl (died in Coconut Grove fire). 6.Meyer:b. 9Feb1900 / d. 24Dec1977 / m. Clara Harvey (b. 28Sept1902 / d. 4May1987).Children: Earl Mark, Carol Frances. 7. Pearl:b. 19Apr1902 / d. 24Feb1991 / m. Henry Mintz.Children: Fanna, Alan 8. Mary: b. 18Apr1904 / d. 7Aug1983 / m. Lewis Siegel (b. 15Jan1905 / d. Aug1974).Children:Franklin, Carole.
I have some more details on the children so let me know if you're interested.