I found about 315 Barnards in the 1880 Pennsylvania federal census.
1880 United States Federal Census > Pennsylvania > Armstrong > Cowanshannoe > District 4 image 22
Barnard, G A, head, age 70 ?, born Connecticut, both parents born Connecticut
Barnard, R A, wife, age 65
Next household enumerated:
Barnard, J R, head, age 30 ?
Barnard, M E, wife, age 30
Barnard, G A, son, age 4
Barnard, D J, son, age 2/12 ?
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