Benjamin Stearn b. 1890, New York, NY - Orphan ? ?

Question

I have a Benjamin Stearn, born 29 July  1890 in New York, NY.  He married a Frieda Behrens (born 23 June 1891, in New Jersey) on 18 Sept  1909.  According to his draft card he was born 29 Jul 1890 in New York, New York.  His marriage cert. lists his name as Stearn but his father's name as Louis Stern and mother Unknown.  A search for a birth or death cert. has turned up empty.  After his WW2 draft card he becomes untraceable.

His relationship with a Louis Stern – whose name is connected with Hebrew Orphanages – and the fact that he didn’t even know his mother’s name, cause me to suspect that he may be an orphan.  Would you agree with me or am I reading too much into it?

"United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M4TW-4VJ : accessed 06 Aug 2013), Benjamin Stearn, 1920.

"United States World War I Draft Registration Cards, 1917-1918," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KZVQ-M22 : accessed 06 Aug 2013), Benjamin Stearn, 1917-1918.

"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K4B4-Y5M : accessed 06 Aug 2013), Benj Stearn in entry for Minnie Klein, 1940.

"United States World War II Draft Registration Cards, 1942," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XTMM-925 : accessed 06 Aug 2013), Benjamin Stearn, 1942.

Comments

There may have been another reason, other than that of being an orphan, that his mother's name was not on the the certificate. He may have been a casualty of WWI.