Is a man believed to say he divorced his wife and a shchiv mara that said write my nechosim and give it to me ploni

Is a man believed to say he divorced his wife and a shchiv mara that said write my nechosim and give it to me ploni

When Yonasan Ben uziel was given yerusha from somebody and he gave some back to the nifters kids and is a person believed to say this is my son or brother. (Story of hashgacha of the ohavei yesh)

Different cases does a wife moichel her kesuba when her husband gives her gifts and giving one's children yerusha even if they are not going in the derech hatorah

If somebody writes his nechosim to his wife when he's healthy does he mean to give it to her or just build up respect for her and a wife being moichel her kesubah for a little karka

Did Reb Yochanan Ben Broka say his Halacha that a father can control his Yerusha even though he used the loshon ye when he's healthy or only if he's about to die

Clarifying Reb Yochana Ben Broka shita and when we say you can act on Halacha lmaisia 

Using a loshon of Matana and yerusha when it works as a matana 4 shitos

Does a person prefer having sons or daughters and mizakeh lehuber is it koneh or not