You can name Your variables as You wish (almost, except function names, etc.)
So, don't worry
I as variable can be use, like below:
Range("I"&I).value
so, depends on I value it can be reference to I1, I2 or whatever.
You can rename it for Dim X as integer, as You wish, BUT from programming point of view X,Y,Z usually is set for variables which have to be calculated (as unknown on start) if you know what I mean.
For simple integer to looping usually i,j or etc. are used.
As I said as You wish.
Of course when this loop is finish, You can start new:
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