Please Note: This article is written for users of the following Microsoft Excel versions: 2007, 2010, 2013, and 2016. If you are using an earlier version (Excel 2003 or earlier), this tip may not work for you. For a version of this tip written specifically for earlier versions of Excel, click here: Generating Unique, Sequential Names.
Steven is testing some software and he needs to feed into the program a bunch of "fake" names. He would like these names to be patterned such as Nameaaa, Nameaab, Nameaac, and so on through Namezzz. This would require creating 17,576 names (26 x 26 x 26). He wonders if there is an easy way to generate all these names in Excel.
This sort of repetitive task just cries out for a macro. (They are great for doing boring, dull, repetitive tasks that you don't want to do manually.) Listing 1 shows a simple macro that can do the required grunt work.
Listing 1. CreateNames macro.
Please Note:
This article is written for users of the following Microsoft Excel versions: 2007, 2010, 2013, and 2016. If you are using an earlier version (Excel 2003 or earlier), this tip may not work for you. For a version of this tip written specifically for earlier versions of Excel, click here: 
Sub CreateNames()
Dim i As Integer
Dim x As Integer
Dim y As Integer
Dim z As Integer
i = 1
For x = 97 To 122
For y = 97 To 122
For z = 97 To 122
Cells(i, 1) = "Name" & Chr(x) _
& Chr(y) & Chr(z)
i = i + 1
Next
Next
Next
End Sub
The macro uses three variables (x, y, and z) to serve as "counters" that control which letter of the alphabet is appended to the "name" stuffed into a cell. Notice that the For ... Next loops range from 97 to 122, which are the ASCII codes for lowercase a through z.
If you don't want to use a macro for some reason, type the following formula into cell A1 of a blank worksheet:
="Name" & CHAR((ROW()-1)/676+97)&CHAR(MOD( (ROW()-1)/26,26)+97)&CHAR(MOD(ROW()-1,26)+97)
This is a single formula, and it results in "Nameaaa" being displayed. Copy the formula down through row 17,576 and you'll have your fake names.
Note:
ExcelTips is your source for cost-effective Microsoft Excel training. This tip (12129) applies to Microsoft Excel 2007, 2010, 2013, and 2016. You can find a version of this tip for the older menu interface of Excel here: Generating Unique, Sequential Names.
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2018-10-20 11:33:47
Rick Rothstein
Actually, since we are working with fixed ranges, we can use the square bracket shorthand notation for the Evaluate function and shorten up that code line slightly...
'========START CODE========
Sub CreateNames()
Range("A1:A17576") = [IF({1},"Name"&CHAR((ROW(A1:A17576)-1)/676+97)&CHAR(MOD((ROW(A1:A17576)-1)/26,26)+97)&CHAR(MOD(ROW(A1:A17576)-1,26)+97))]
End Sub
'========END CODE========
2018-10-20 11:32:09
Rick Rothstein
Since you know of a formula that will work, why not use it in the macro and eliminate all of that looping? The following one-liner (albeit a rather long one) macro will produce the same output as your macro does...
'========START CODE========
Sub CreateNames()
Range("A1:A17576") = Evaluate("IF({1},""Name""&CHAR((ROW(A1:A17576)-1)/676+97)&CHAR(MOD((ROW(A1:A17576)-1)/26,26)+97)&CHAR(MOD(ROW(A1:A17576)-1,26)+97))")
End Sub
'========END CODE========
Note: If you only want to create a partial list, say 5000 names instead of the entire list of 17576 total names, simply change the range you are assigning to from Range(*A1:A17576") to Range("A1:A5000")... nothing else has to change.
2016-09-24 05:36:28
Adam
This is OK for a batch run but not for something you use and close and use again the next day. e.g. an invoice.
I did a work around macro on this on a job order printed form. It is like hiding in plain sight.
I have a serial number in cell k4 in white text on a white background so you cannot see it or print it, and the row is hidden to avoid mistaken erasing.
Then in K5 I have =K4+1 in black.
I put in the detail and print the form and then make K4 value = K5 value and start again.
This way the serial number stays there when the sheet is saved and closed and starts up again from the same place.
It's not very fancy or robust but it works well. There is probably a better way though.
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