I did find a texas birth record for Christopher Maruyama Halfen whose father is listed as Donald Gilbert Halfen but you prob know this

go here to request online all the records...make sure you request everything they have...

http://www.archives.gov/veterans/evetrecs/

might this be his father

1920 United States Federal Census

Name: Norman Halfen
Home in 1920: Chicago Ward 23, Cook (Chicago), Illinois
Age: 15 years
Estimated birth year: abt 1905
Birthplace: Illinois
Relation to Head of House: Son
Father's name: George
Father's Birth Place: Illinois
Mother's name: Bessie
Mother's Birth Place: Illinois
Marital Status: Single
Race: White
Sex: Male
Able to read: Yes
Able to Write: Yes
Image: 661

Household Members: Name Age
George Halfen 39 abt 1881 printer
Bessie Halfen 38 abt 1882
Norman Halfen 15
Ella M Halfen 14
George C Halfen 3 6/12




1930 United States Federal Census

Name: Norman Halfen
Home in 1930: Chicago, Cook, Illinois
Age: 25
Estimated birth year: abt 1905
Relation to Head of House: Son
Father's name: George
Mother's name: Bessie
George Halfen 48 head of house printer
Bessie Halfen 48 wife
George Halfen 13 son


California Death Index, 1940-1997
about NORMAN G HALFEN
Name: HALFEN, NORMAN G
Social Security #: xxxxxxxxx
Sex: MALE
Birth Date: 12 Jul 1904
Birthplace: ILLINOIS
Death Date: 23 Mar 1971
Death Place: LOS ANGELES

If the Norman I found is right , I think this is his father George
World War I Draft Registration Cards, 1917-1918

Name: George William Halfen
City: 733 Briar PL Chicago
County: Cook
State: Illinois
Birth Date: 22 Dec 1881
Race: White
Roll: 1613569
DraftBoard: 50
occupation: Printer for Bates & Heath 59 E Randolph
next of kin Bessie Halfen
Medium height
slender build
Brown eyes
Brown hair

this might be the Bessie married to George

Name: Bessie Halfen
SSN: xxxxxxxxxxxxx
Last Residence: Illinois
Born: 14 Oct 1881
Died: Jun 1964
State (Year) SSN issued: Illinois (Before 1951 )