More info:

1880 Thomas Store, St. Mary's County, Maryland
264/267
Thomas R. Ridgell, self, m, w, 75, married, farmer, b Md, father b Md, mother b Md
Ann M. Ridgell, wife, f, w, 65, married, keeping house, b Md, father b Md, mother b Md
McEderry Ridgell, son, m, w, 29, single, b Md, father b Md, mother b Md
Southron Ridgell, son, m, w, 24, single, b Md, father b Md, mother b Md
Robert H. Ridgell, nephew, m, w, 5, single, b Md, father b Md, mother b Md
Source Citation: Year: 1880; Census Place: Thomas Store, Saint Mary'S, Maryland; Roll: T9_514; Family History Film: 1254514; Page: 37.2000; Enumeration District: 136

1870 District 2, St. Mary's County, Maryland
Post Office Great Mills
309/302
Thos. Ridgel, 66, m, w, farmer, 600, 450, b Md
Auston Ridgel, 22, m, w, farm laborer, b Md
McKelvy, 19, m, w, farm laborer, b Md
Southern, 14, m, w, farm laborer, b Md
Ann, 55, f, w, keeping house, b Md
Source Citation: Year: 1870; Census Place: District 2, St Marys, Maryland; Roll: M593_594; Page: 529

1850 District 3, St. Mary's County, Maryland
446/457
Thomas Rigell, 40, m, farmer, b St. Marys Co.
Ann M., 34, f, b St. Marys Co.
Richard B. Lomax, 12, m, b St. Marys Co.
John T., 10, b St. Marys Co.
Francis H., 8, m, b St. Marys Co.
Mary C., 6, f, b St. Marys Co.
Osten R. Rigell, 1, m, b St. Marys Co.
Louis E., 11, m b St. Marys Co.
Source Citation: Year: 1850; Census Place: District 3, St Mary's, Maryland; Roll: M432_296; Page: 282

From LDS site:

Austin Ranzell Ridgell
Parents: James Thomas Ridgell and Mary Ann Norris
Birth: 09 FEB 1849 , Saint Marys, Maryland
Death: 10 JUN 1933
Spouse: Susanna Rebecca Hammett (daughter of John Abell Hammett and Susanna E. Wilkinson)
Marriage: 02 JAN 1873 , Saint Marys, Maryland

James Thomas Ridgell
Birth: 1809 , Saint Marys, Maryland
Spoouse: Mary Ann Norris
Marriage: Jan 1838, , Maryland

SSDI:
Clarence RIDGELL
Birth Date: 14 Feb 1889
Death Date: Oct 1967
Social Security Number: 212-24-2784
State or Territory Where Number Was Issued: Maryland

Death Residence Localities
ZIP Code: 20687
Localities: Scotland, Saint Mary'S, Maryland

Cheers, Michael
Kent Island, Maryland