Find Unique values in list of cells to populate cells in different worksheet

I have a list of cells (but not the whole column) that contains duplicate values.  I would like to populate cells in a different worksheet with only the unique values from this list.

The list of unique values should update dynamically, if user changes/adds/deletes values in the original list of cells such that the unique values are impacted, the list of unique values will change.

If possible I would like to do this without using VB
Gary AntonellisSenior Application ConsultantAsked:
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barry houdiniConnect With a Mentor Commented:
My method doesn't allow you to have blanks - the zero is from the blank cells - to avoid that change to this formula in A4 copied down

=IFERROR(INDEX(PersonGroupList,MATCH(1,INDEX((COUNTIF(A3:A$3,PersonGroupList)=0)*(PersonGroupList<>""),0),0)),"")

That will ignore blank cells in the list

regards, barry
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barry houdiniCommented:
See attached example

In Sheet1 I listed some repeating values in A2:A20 and named it list using a dynamic named range (which means the definition expands automatically if you add values - but there shouldn't be gaps)

Now in Sheet 2 for the unique list I put this formula in A2

=INDEX(List,1)

and then this formula in A3 copied as far down as needed and further

=IFERROR(INDEX(List,MATCH(0,INDEX(COUNTIF(A$2:A2,List),0),0)),"")

as long as you copy this formula down far enough the list will automatically update as you change the sheet1 list

regards, barry
unique-list.xlsx
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Gary AntonellisSenior Application ConsultantAuthor Commented:
I am doing something wrong, but I am close!  I attached a portion of spreadsheet.  I am getting unique values of worksheet "P-Pay Rules" cells A20-A61 to populate worksheet "config_Hours_Class" cells A3-A16 except the first cell with formula (A4) contains '0' instead of the second value in list

I attached sample spreadsheet

Thanks!
Example.xlsx
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Gary AntonellisSenior Application ConsultantAuthor Commented:
I feel like I am abusing you!

Your suggestion worked fine but another requirement was added.  I need to contatenate the string 'HRS_CLASS_GRP_' to the start of each unique value, but when I do it messes up the comparison to the previous values in list, returning the first value in list.

On the second tab I was expecting row 4 to contain 'HRS_CLASS_GRP_Exempt-Engineers' but it contains the same value as row 3.

Thanks!
Example2.xlsx
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