I do not agree with this explanation of Wali my brother.
Wali means in simple langauge is Friend of Allah SWT . You can not go on translating in all world's langauges to give exact meaning of the word Wali.
Moreover, a Wali is one who dedicated his life in ibadah and sunna of our Prophet Hazreth Muhammed not by other prophets. After Islam, all the muslims of high profile except Khulfai Rashedeen,Sahebis, others are Walis.
Other from Yehudi and Nasara will be called Abeedeen or let them be called saints what different does it make.