Here is this Koller family in the 1940 census of Ward 7, Wilmington, Representative District 3, New Castle, Delaware:
Name Role S Age Born Joseph P Koller Head M 49 New York Mary R Koller Wife F 42 Colorado John R Koller Son M 14 Delaware Judith R Koller Dau. F 11 Delaware
Also, from the familysearch.org website:
Name: John R. Koller Event Type: Burial Event Date: 2013 Event Place: Bear, New Castle, Delaware, United States of America Birth Date: 08 Apr 1925 Death Date: 01 Jan 2013 Affiliate Record Identifier: 133106003 Cemetery: Delaware Veterans Memorial Cemetery.
Again, from the familysearch.org website:
Judith Rubidge Koller mentioned in the record of Robert Boyd Jr. Cooling and Judith Rubidge Koller Name: Robert Boyd Jr. Cooling Event Type: Marriage Event Date: 03 Feb 1951 Event Place: Wilmington, New Castle, Delaware Gender: Male Age: 23 Birth Year (Estimated): 1928 Father's Name: Robert Boyd Cooling Mother's Name: Florence Eaton Cooling Spouse's Name: Judith Rubidge Koller Spouse's Age: 22 Spouse's Birth Year (Estimated): 1929 Spouse's Father's Name: Joseph Peter Koller Spouse's Mother's Name: Mary Rubidge Koller Reference ID: cn 187, GS Film number: 2025183, Digital Folder Number: 4253530, Image Number: 211
Can you provide names, corrections or comments?