Writing part of table to an excel file with variable sheet name

I am writing a code that I need to have output as an excel file. Because I need to save some part of table into different excel file then my output is creatied inside a `for` loop. Something like this:

    for j=1:5
        Table = table(ColAA(:,j),ColBB(:,j),ColCC(:,3*j-2:3*j),ColWW(:,j));
        filename_excel = [ name '_N' num2str(1) '_Seg' num2str(j) '.xlsx'];
        writetable(Table,filename_excel,'Sheet', j, 'Range','A5');
    end

The Table is as

    Table = 

                Var1    Var2    Var3    Var4 
                ____    ____    ____    ____

                 38      71      176     124
                 43      69      163     109
                 38      64      131     125
                 40      67      133     117
                 49      64      119     122

I have two question regarding above code:

1. The name of the columns are not going to be the original name and it is just because some parts of table are needed. How could I have the original name in output,too.
2. The difficult part for me is that I need to save each sheet inside a loop with the same/different name but with a different indices. How could be done this inside that `for` loop?