This is either a version of the name Ilyās with a plural of respect, or referring to his family and/or people of his kind (a lightened form of ilyāsiyyīn)
آلِ يَاسِينَ
āli Yāsīna
“Peace be to Elijah's folk”
This may refer to the family of Ilyās (or people like him) using a shortened version of his name.
وضاحت:
These readings convey the same meanings in slightly different ways. Some scholars have taken the second reading to refer to the family of Muhammad ﷺ who is sometimes known as Yā-Sīn (see commentaries on 36:1). NB: the orthography contains a separation between the two words, but both may be read on the same skeletal form.
He has revealed to you ˹O Prophet˺ the Book in truth, confirming what came before it, as He revealed the Torah and the Gospel
وضاحت:
These readings convey the same meanings in slightly different ways. Some scholars have taken the second reading to refer to the family of Muhammad ﷺ who is sometimes known as Yā-Sīn (see commentaries on 36:1). NB: the orthography contains a separation between the two words, but both may be read on the same skeletal form.