Highlight Approximate Match in a column (Not exact Match)

I have a list of names in column A. I want to highlight the names if it matches 70%

For example :

1. Ram Kumar
2. Rama Kumar
3. Akash Tripathi
4. Aakash Tripathi
5. Mr. Ram Kumar
6. Akash M Tripathi
7. Ram Kumar

Excel conditional formatting finds Row 1 & 7 as exact match, but it can't help with others. Where as Row 1,2,5 & 7 are actually same person. I need formula for Conditional Formatting.

Somehow, I found one formula but its not working in my case.

=IF(A1<>"",COUNTIF($A$1:$A$23,"*"&MID(A1,1,INT(LEN(A1)*0.7))&"*")>1)

Excel Fuzzy Lookup thing is not for me, Because I want conditional formatting formula, which can highlight cell instantly after entering data. This sheet gets regular entries from various persons.

Thanks.

dump, Anyone ?