Assuming that you have a Named Range in from the Define Names dialog box.
To select the cell in the fifth row of the named column colName, you could use the syntax
Range("colName").Cells(5, 1).Select
or
Range("colName").Range("A5").Select
A worksheet function for the same cell would be =INDEX(colName, 5, 1)
One difference between VB Cells and worksheet INDEX, is that if the 5, 1 is changed to a 5, 2 the VB won't error (it will return the 5th row of one column to the right of colName. INDEX will error.