His marriage record says his wife if Celimine/Celimene (not Philemon) Richard?
See marriage IMAGE here: https://www.familysearch.org/ark:/61903/3:1:33SQ-G5BH-K6
Source: "Louisiana, Parish Marriages, 1837-1957," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QKJH-B7WF
: 13 March 2018), Gorland Peck and Celemene Or Celimene Richard, 02 Jan 1868; citing St. Landry, Louisiana, United States, various parish courthouses, Louisiana; FHL microfilm 870,695.
Name Gorland Peck Male
Marriage 02 Jan 1868 St. Landry, Louisiana, United States
Spouse Celemene Or Celimene Richard Female
Witness Homer Richard
Source: "United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MDXX-BV2
: 15 August 2017), Garland Peck, 2nd Ward, St Landry, Louisiana, United States; citing enumeration district ED 2, sheet 218A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0470; FHL microfilm 1,254,470.
United States Census, 1880 2nd Ward, St Landry, Louisiana
Garland Peck Self M 35 Louisiana
''Philamen Peck'' Wife F 29 Louisiana
Eulela Peck Daughter F 11 Louisiana
Selema Peck Daughter F 7 Louisiana
Charles Peck Son M 5 Louisiana
Lelia Peck Daughter F 4 Louisiana
Parmela Peck Daughter F 2 Louisiana
Aline Peck Daughter F 0 Louisiana
More records here: Celma, Selema, Celemine etc. https://www.familysearch.org/search/record/results?count=20&query=%2Bgivenname%3Agarland~%20%2Bsurname%3Apeck~%20%2Bbirth_place%3Ala~%20%2Bbirth_year%3A1840-1850~