1a- The closer to Arabic language is Othman

 

b- The closer to Arabic language is Hussain

 

2a- The verse from the Quran: “And say my Lord, increase me in knowledge.” (Taha 20:114)

b- “O lord give us in this life Hashanah and in the Hereafter Hashanah and prevent us from Hellfire” (Al-Baqarah 2:201)

 

3a,b- There is no Dua for that. Stop reaching out to people who do not feel interested in you and look for a proper way to find another. The general Dua for that is: O Lord, to that which you have bestowed on me I am in need.” (Al-Qasas 28:24)