| Sources  | 
- [S19]  1900 US Federal Census, (www.ancestry.com).
 
Name: William J Ehrstein Home in 1900: Rochester Ward 1, Monroe, New York Age: 10 Estimated birth year: 1890 Birthplace: New York Race: White Relationship to head-of-house: Son Image source: Year: 1900; Census Place: Rochester Ward 1, Monroe, New York; Roll: T623 1073; Page: 1A; Enumeration District: 30. 
 
  
- [S30]  1910 US Federal Census, (www.ancestry.com). 
 
  
- [S24]  1920 US Federal Census, (www.ancestry.com).
 
Name: William Ehrstein Age: 29 years Estimated birth year: abt 1891 Birthplace: New York Race: White Home in 1920: Rochester Ward 20, Monroe, New York Sex: Male Marital status: Married Relation to Head of House: Son Able to read: Yes Able to Write: Yes Mother's Birth Place: New York Father's Birth Place: Germany Image: 855 
 
  
- [S25]  1930 US Federal Census, (www.ancestry.com).
 
Name: William W Ehrstein Age: 59 Estimated birth year: abt 1871 Birthplace: New York Relation to head-of-house: Head Spouse's Name: Eva Ehrstein Race: White Home in 1930: Rochester, Monroe, New York Image source: Year: 1930; Census Place: Rochester, Monroe, New York; Roll: 1454; Page: 9A; Enumeration District: 171; Image: 689.0. 
 
  
- [S891]  World War I Draft Registration Cards, 1917 - 1918, (www.ancestry.com).
 
Name:	William J Ehrstein 
City:	Rochester 
County:	Monroe 
State:	New York 
Birthplace:	New York;United States of America 
Birth Date:	Apr 10 1891 
Race:	White 
Roll:	1818715 
DraftBoard:	2 
  
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