You could make the Named Ranges dynamic
AName:
Formula:![]()
=Attendance!$A2:INDEX(Attendance!$A:$A,COUNTA(Attendance!A:A))
AMonth:
Formula:![]()
=Attendance!$B2:INDEX(Attendance!$B:$B,COUNTA(Attendance!A:A))
Note: use the same column for the COUNTA.
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