Hello
this may be of no help but you might find this site helpful - it is the Ellis Island site for arrival of immigrants to the US through Ellis Island
http://www.ellisisland.org/this might be of interest to you
Ada E Reddekopp
born about 1883
Benewah, Idaho
1930 United States Federal Census
David E Reddekopp
born about 1886 Benewah, Idaho
1930 United States Federal Census
I don't have access to the census data beyond that though I did find the following
http://vitals.rootsweb.com/ca/death/search.cgiREDDEKOPP, DAVID EMELD
born - 10/21/1888
mother's maiden name DYCK
fathers last name REDDEKOPP
born in CANADA
died at ALAMEDA(01)
date of death 04/04/1950
age at death 61 yrs
this should be his wife
REDDEKOPP ADA E
born 08/04/1880
mother's maiden name PRESCOTT
died at ALAMEDA(60)
date of death 03/11/1969
SSN number 550-72-1648
age at death 88 yrs
Ada's SSN application lists her birth differently and this is the form that she would have filled out so it may be more accurate
ADA REDDEKOPP
born 04 Aug 1887
died Mar 1969 94507 (Alamo, Contra Costa, CA)
550-72-1648 California
who ever filled out her death registration may have given the wrong date.
This SSN application is available (have to confess I have no idea how though)
Here is David in Canada
64 Reddekopp Abraham M Head M Sep 13 1855 45
33 64 Reddekopp Katharina F Wife M Oct 19 1855 45
34 64 Reddekopp Abraham M Son S Oct 19 1883 17
35 64 Reddekopp David M Son S Sep 21 1888 12
36 64 Reddekopp Katharina F Daughter S Jul 18 1891 9
37 64 Reddekopp Jacob M Son S Sep 23 1893 7
38 64 Reddekopp Wilhelm M Son S Feb 19 1897 4
39 64 Reddekopp Isaac M Son S May 20 1898 2
He and his family immigrated from Russia in 1892
Go to this site, select the 1901 Canadian Census, then select surnames starting with R and then find Reddekopp. At the bottom of the page is a link to a page where you can register your interest in this family so if anyone is researching this family you can connect with them.
http://automatedgenealogy.com/index.htmlGood luck
Thelma