She married Elijah Blackshear, son of Jesse Blackshear & Hannah Huggins, about 1822 in Williamson Co, Tenn. Shortly thereafter, Dicena & Elijah moved to Wayne Co, Tenn. They had 4 known children:

1. Lucinda Blackshear 1823-d. 1849 Wayne Co, Tenn.
2. James Newton Blackshear 1826-1863, buried Blackshar Cemetery, Find a Grave Memorial #127857673.
3. Jesse Marion Blackshear, 1829-?. He appeared on 1890 tax list in Wayne Co, Tenn.
4. Hannah Permelia "Penny" Blackshear 1833-1921. She married Burton Dill Keaton. She died in Pontotoc Co, Mississippi.

Husband Elijah Blackshear died 1838 in Wayne Co Tenn. and soon after Dicena "Dicy" McMahan Blackshear married widower William Davidson (1790-1847) and they had two children:

1. Alfred Davidson, born May 15, 1839 in Wayne Co, Tn. He married Dicena Catherine "Dicy" McMahan (1841-1925), daughter of Lorenzo D. MCMAHON and Matheldy MARRS. Alfred Davidson & his wife Dicy are buried in Tune Cemetery, Highway 114, Garland Nowlin farm, see Find a Grave Memorial #117793451.

2. Louisa Jane Davidson, born abt 1844. She is enumerated on the 1850 and 1860 federal censuses for District 5, Wayne Co, Tenn. She was age 6 on the 1850 census; 16 on the 1860 census, living with her widowed mother Dicy Davidson.
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Sources:

Tennessee State Marriages, 1780-2002:
Name: Dicina Mcmahon
Spouse: Elijah Blacksher
Marriage Date: 10 Apr 1822
Marriage County: Williamson
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DISTRICT #5, 1838 Wayne County TN Tax List, BLACKSHER, Dycy 60.
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1840 United States Federal Census:
Name: Dennia Blackshear
Home in 1840 (City, County, State): Wayne, Tennessee
Free White Persons - Males - 10 thru 14: 1
Free White Persons - Females - 5 thru 9: 1
Free White Persons - Females - 10 thru 14: 1
Free White Persons - Females - 40 thru 49: 1
Persons Employed in Agriculture: 1
No. White Persons over 20 Who Cannot Read and Write: 1
Free White Persons - Under 20: 3
Free White Persons - 20 thru 49: 1
Total Free White Persons: 4
Total All Persons -
Free White, Free Colored, Slaves: 4
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1850 United States Federal Census:
Name: Dicy Davidson
Age: 52
Birth Year: abt 1798
Birthplace: North Carolina
Home in 1850: District 5, Wayne, Tennessee
Gender: Female
Family Number: 644
Household Members: Name Age
Dicy Davidson 52
H P Blackshaw 16 [dau. Hannah Permelia Blackshear]
L J Davidson 6 [dau. Louisa Jane Davidson]
Alford Davidson 11 [son Alfred Davidson]
J F Carr 21
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1860 United States Federal Census:
Name: Dicy Davidson
Age in 1860: 62 Birth Year: abt 1798
Birthplace: North Carolina
Home in 1860: District 5, Wayne, Tennessee
Gender: Female Post Office: Sorby
Household Members: Name Age
Dicy Davidson 62
Louisa I Davidson 16
Wm J Mcmahan 22 [Dicy's nephew]
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1870 United States Federal Census:
Name: Dicy Davidson
Age in 1870: 71 Birth Year: abt 1799
Birthplace: North Carolina
Home in 1870: District 5, Wayne, Tennessee
Race: White Gender: Female
Post Office: Waynesboro
Household Members: Name Age
Alfred Davidson 30
D C Davidson 27
W H Davidson 10
M H Davidson 4
S E Davidson 1
Dicy Davidson 71
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1880 United States Federal Census:
Name: Dieena Davidson [Dicena Davidson]
Age: 83 Birth Year: abt 1797
Birthplace: North Carolina
Home in 1880: District 2, Wayne, Tennessee
Race: White Gender: Female
Relation to Head of House: Mother-in-law
Marital Status: Widowed
Father's Birthplace: North Carolina
Mother's Birthplace: North Carolina
Household Members: Name Age
B. D. Keeton 52
Hamah P. Keeton 47
Saroh E. Keeton 21
Adelia Keeton 16
John I. Keeton 11
Martha E. Keeton 7
Dieena Davidson 83
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