William Sedwick McQuilling
  [Adam Kline McQuilling / Margaret Isabel Sedwick]
b. May 1876, Pasadena, Los Angeles, California1,7
d. abt 191211c
m. abt 1906 Mary Amber Prindle

Mary Amber Prindle  [parents unknown]
b. November 7, 1879 Missouri10
d. August 8, 1970 Alameda County, California10

Census records:

1900 CA Los Angeles

William later spelled his middle name Sedgwick.11c

Children:

Robert Edgar McQuilling
  b. September 22, 1907, [Pasadena] Los Angeles, California17
  d. July 15, 1967, Kern County, California10
Donald William McQuilling
  b. January 21, 1909, [Pasadena] Los Angeles, California17
  d. May 16, 1995, Santa Cruz County, California10
  m. abt 1930 Carol Felicia Shriver11c

Son Robert Edgar McQuilling served in the Navy and Marines in WWII and was held as a POW by the Japanese.11c

Sources:

1. Census records, any of those indicated.

7. Obituary of Adam Kline McQuilling
Pasadena (Cailfornia) Star News, July 3, 1940
Posted by Linda C Driscoll at Ancestry: California Los Angeles

10. California Death Records
an Ancestrty.com database
These records:
NameSexBirth DateDeath DateBirth PlaceDeath PlaceMother's MaidenFather's Surname
McQuilling
Carol Felicia
F22 Jul
1910
6 Apr
1984
New
Mexico
Santa
Clara
GroutShriver
McQuilling
Donald William
M21 Jan
1909
16 May
1995
CaliforniaSanta
Cruz
Prindle 
McQuilling
Mary A
F7 Nov
1879
8 Jul
1970
MissouriAlameda  
McQuilling
Robert E
M22 Sep
1907
15 Jul
1967
CaliforniaKernPrindle 

11. Personal knowledge of family members
c. Kathleen McQuilling, descendant of William Sedwick Mcquilling

17. California Birth Index, 1905-10
an Ancestrty.com database

Questions? Have more data? genealogy@sedgwick.org