Pardon my error, that last technique is the "when I only want it during this session" method with JAWS.   This is how to set them in the spreadsheet itself such that JAWS will recognize their existence and announce them whenever you open a specific spreadsheet:

Assigning a Title Row (Column Titles) and/or Title Column (Row Titles) in Excel

You can assign column and row titles in Excel. These are nice because they always work with Excel and are saved to the workbook. There's no risk of losing a setting in your screen reader.

To add column and row title names:

1. Focus on the first cell in the row or column or at the first cell where the title row and title column intersect
2. Open the Name dialog:

                                                               i.      Open the Formula ribbon (ALT-M)

                                                             ii.      Activate the “Define Name” command (M)

                                                           iii.      Within the drop-down list, activate “Define Name”

                                                           iv.      The “New Name” dialog opens

Focus is placed in the name field. Within the name field, you can name the focused cell or selected range of cells. In this case, we’re naming the column or row title:

1. Name the cell using the following rules

                           i.  Start the range name with the label that tells Excel you’re creating a title range

1. Title – This tells Excel the column and row that intersect at the active cell are a title row and column
2. ColumnTitle – This tells Excel the focused column contains the titles for the rows within the range
3. RowTitle – this tells Excel the focused row contains titles for the columns in the range

                            ii.      Add a name for the range

1. Title_WidgetSales
2. ColumnTitle_WidgetSales
3. RowTitle_WidgetSales

                              iii.      Optional - Add the last cell in the range preceded by two periods

1. Use this when you have multiple regions in a worksheet
2. Title_WidgetSales..J25
3. ColumTitle_WidgetSales..h32
4. RowTitle_WidgetSales..r12
5. Remember the cell address referenced is the last cell in the range for which you are creating titles

The next field in the dialog sets the scope for the name. this is a combo box. Use UP and DOWN ARROW to choose from between:

• Workbook - the title Is unique and can’t be used elsewhere in a workbook
• A Specific Worksheet - the name can be used elsewhere in a workbook

You can add a comment for the named cell or region, this is strictly for your personal reference and doesn’t affect the echo of the column or row title name

The last field references the cell name or range of selected cells you’re naming. You can leave this field alone.

Activate the OK button to save the name and close the dialog.

Save the workbook and the titles are permanently saved and will work on any computer.

If you have titles set to echo in JAWS, the titles will echo and you won’t lose the settings.

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Brian - Windows 10 Pro, 64-Bit, Version 1809, Build 17763  

Here is a test to find out whether your mission in life is complete.  If you’re alive, it isn’t.

       ~ Lauren Bacall