Mahala Haun married John Thompson Adam on 18 Sep 1878 in Hollister, San Benito, California, USA. They had the following children:
- William Zimry "Bucksin" Adam, b: 26 Jun 1879, Gilroy, Santa Clara, California, USA
d: 29 Aug 1964, Pleyto, Monterey, California, USA
md: Rosetta Grace Doty
- John Ruphas Adam, b: 12 Oct 1882, Gilroy, Santa Clara, California, USA
d: 15 Oct 1973, Monterey County, California, USA
md: Mary Inez Vickrey
- Ruby Pearl Adam, b: Mar 1890, Monterey County, California, USA
d: May 1969, Nipomo, San Luis Obispo, California, USA
md: Edward Oliver Kirkpatrick; Alex Barron
They raise their nephew who's parents are Edward Merrit and Laura Elizabeth Haun who died in 1892:
- Thomas Alden Merritt (nephew), b: 30 Jun 1889, Modesto, Stanislaus, California, USA
d: 23 Jun 1952, Modesto, Stanislaus, California, USA
After the death of her first husband, Mahala married Thomas O'Neill on 21 Apr 1906 in Imperial County, California, USA. Thomas O'Neill and Thomas Alden Merritt later go in on a Ranch in Palo Verde, Riverside, California, USA.∼In the California, U.S., Death Index, 1905-1939
Name: Mahala Oneil
Birth Year: abt 1861
Death Date: 20 Feb 1916
Age at Death: 55
Death Place: Imperial, California, USA

In the California, U.S., County Birth, Marriage, and Death Records, 1849-1980
Name: Mahala Adams
Gender: Female
Marriage Age: 57
Event Type: Marriage
Birth Date: abt 1849
Birth Place: California
Marriage Date: 21 Apr 1906
Marriage Place: Imperial, California, USA
Spouse: Thomas O'Neill

In the 1870 United States Federal Census
Name: M J Hann
Age in 1870: 11
Birth Date: abt 1859
Birthplace: California
Dwelling Number: 492
Home in 1870: Gilroy, Santa Clara, California
Race: White
Gender: Female
Post Office: Gilroy
Occupation: At School
Attended School: Yes
Cannot Write: Yes
Inferred Father: Z Hann
Inferred Mother: Elizabeth Hann