Well, for what it's worth, my grandmother and grandfather Eastman moved from Nebraska to Boise, ID. Here's their family:

Guy S. Eastman (c. 1875) + Lula Hadden (b. 1883)
-Bruce H. Eastman (abt. 1915)
-Helen Eastman (abt. 1917 - 1950)
-Harriet Eastman (abt. 1918 - abt. 1930)
-Henrietta Eastman (1918-1993)
-Betty Eastman (1922 - )
-Blaine Eastman (abt 1924 - 2001)

My mother was Henrietta Eastman (as above). I don't know if this info will help. There are also several Eastmans in the local Seattle, WA, phone book. You could search for those directories here at Ancestry.com.