Here is another option to see if a cell exists inside a range. In case you have issues with the Intersect solution as I did.
If InStr(range("NamedRange").Address, range("IndividualCell").Address) > 0 Then
'The individual cell exists in the named range
Else
'The individual cell does not exist in the named range
End If
InStr is a VBA function that checks if a string exists within another string.
https://msdn.microsoft.com/en-us/vba/language-reference-vba/articles/instr-function