Rename Pandas column values

I have pandas dataframe like this

I want to name the column 2 as:

I am trying the ways that are hard coded, like renaming each column, but in practice I have lots of rows so hard coding is not possible, is there any function or something python that can do the same task for me?

>Solution :

Let’s try Series.factorize

df['Column2'] = (pd.Series(df['Column2'].factorize()[0])
                 .add(1).astype(str).radd('row'))

print(df)

   Column1 Column2
0        1    row1
1        2    row1
2        3    row2
3        4    row3
4        5    row4