| Sources  | 
- [S19]  1900 US Federal Census, (www.ancestry.com). 
 
  
- [S30]  1910 US Federal Census, (www.ancestry.com).
 
Name: William P Koester Age in 1910: 15 Estimated birth year: abt 1895 Birthplace: New York Relation to Head of House: Son Father's name: William Father's Birth Place: Germany Mother's name: Philipine Mother's Birth Place: Germany Home in 1910: Rochester Ward 5, Monroe, New York Marital Status: Single Race: White Gender: Male 
 
  
- [S24]  1920 US Federal Census, (www.ancestry.com).
 
Name: William P Koester Home in 1920: Rochester Ward 5, Monroe, New York Age: 24 years Estimated birth year: abt 1896 Birthplace: New York Relation to Head of House: Son Father's name: William Father's Birth Place: Alsace-Lorraine Mother's name: Philipina Mother's Birth Place: Germany Marital Status: Single Race: White Sex: Male Able to read: Yes Able to Write: Yes Image: 86 
 
  
- [S25]  1930 US Federal Census, (www.ancestry.com).
 
Name: William P Koester Home in 1930: Rochester, Monroe, New York Age: 35 Estimated birth year: abt 1895 Relation to Head of House: Son Parent's Name: Philippine 
 
  
- [S891]  World War I Draft Registration Cards, 1917 - 1918, (www.ancestry.com).
 
Name: William Phillip Koester City: Rochester County: Monroe State: New York Birthplace: New York;United States of America Birth Date: 16 Apr 1895 Race: Caucasian (White) Roll: 1818806 DraftBoard: 5 
 
  
- [S169]  Rochester, Monroe County, New York Historic Marriage Record Research Site.
 
City of Rochester Archives and Records CenterHistoric Marriage Records Research Site Search Results 
(Scroll down to see the entire record) 
Page Number	249 
Date of Marriage	09/28/1886 
Husband's First Name	WILLIAM 
Husband's Middle Name 
Husband's Last Name	KOESTER 
City	ROCHESTER 
State	NY 
Husband's Age	21 
Husband's Color	W 
Husband's Occupation	BAKER 
Husband's Birth Place 	GERMANY 
Husband's Birth State 	NY 
Husband's Father's First Name	GEORGE 
Husband's Father's Middle Name 
Husband's Father's Last Name	KESTER 
Husband's Mother's First Name	SALOME 
Husband's Mother's Maiden Name 
Husband's Mother's Last Name	ARNOLD 
Husband's Number of Marriages	1 
Wife's First Name	PHILIPENE 
Wife's Middle Name 
Wife's Maiden Last Name	AULENBACHER 
Residence/City	ROCHESTER 
Residence_State	- 
Wife's Age	24 
Wife's Color	W 
Wife's Birth Place	GERMANY 
Wife's Birth State	- 
Wife's Father's First Name	JACOB 
Wife's Father's Middle Name 
Wife's Father's Last Name 
Wife's Mother's First Name	ELIZ 
Wife's Mother's Middle Name 
Wife's Mother's Maiden Name	KLEIM 
Wife's Number of Marriages	1 
Marriage Official's Name	JOSEPH REICHTSTEIN 
Marriage Official's Position 
Where Recorded 
Roll Number	1 
  
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