Just compare the number of the same letters existing in either partners' names. If the number of letters is more than %50 percent. Then you could become good lovers or good friends.
Example: Girl's name: Olivia, Boy's name: Liam
Oliva has 'i', 'l' and 'a' common letters from Liam: ((6-2)/6)100=%67
Liam has 'i', 'l' and 'a' common letters from Olivia: ((4-1)/4)100=%75
Liam will fall in love with Olivia more than she does with Liam. Since both of them exceed %50. This relation ship would be a good one.