Do the numbers 18 on the right hand and 81 on the left hand, totaling 99, represent the Beautiful Names of Allah?

The interpretation of lines on the palm of a human hand has no basis in Islamic law. The names of Allah are not confined to a specific number. The well-known saying among the majority of scholars, "Indeed, Allah has ninety-nine names; whoever enumerates them will enter Paradise," does not mean that the names are limited to this number. Rather, it means that whoever enumerates these specific names will enter Paradise. The Hadith (definition), "I ask You by every Name belonging to You by which You have named Yourself..." indicates that Allah has names that He has kept exclusively within His knowledge of the unseen.