All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.
Among the good things enjoined by Sharee‘ah is to choose good names for the children. Undoubtedly, the names of the Prophets, may Allaah exalt their mention, are the best to be given to the children. So, there is no harm on you to name your child Yahya. Rather, that is a good thing to do, and we ask Allaah that your child will have a share in the sense of the attributes of Prophet Yahya (John) who carried the same name. Also, this blessed name was given to a group of righteous people and scholars.
However, we do not understand what a Jalaali name means. Nevertheless, we ascertain that there is no impediment to name with this blessed name.
On the other hand, Allaah The Almighty praised His Prophet Yahya with many good attributes, one of which is that he kept away from sexual relations with women, even though he was able to do so, according to the preponderant opinvion of the interpreters of the Quran. It may be that celibacy was permissible in his Sharee’ah, but it is not so in ours. Indeed, we are commanded to imitate the Prophets, may Allaah exalt their mention, in doing what Allaah likes and is pleased with, and leaving what Allaah dislikes and is displeased with. We are also commanded to do all that brings one closer to Allaah; and since marriage in our Sharee‘ah brings one closer to Allaah The Almighty, then it is legitimate for us to marry.
Allaah Knows best.