The passage reads: וַיִּקְרָ֨א שְׁמ֜וֹ פֶּ֠לֶא יוֹעֵץ֙ אֵ֣ל גִּבּ֔וֹר אֲבִי־עַ֖ד שַׂר־שָׁלֽוֹם׃ / "Pëlë Yo'étz Él-Gibbor Avi-Ad [descriptions of G-d] has named him: 'Sar-shalom'."
פֶּלֶא / pëlë = wonderful one
יוֹעֵץ֙ / yo'étz = advisor
אֵ֣ל גִּבּ֔וֹר / el-gibbor = mighty G-d (or powerful hero)
אֲבִי־עַ֖ד / avi-ad = father of eternity
named him (the child already born) שַׂר־שָׁלֽוֹם / peace prince.
The main issue with stating that this titles are for Jesus is that this entire passage is in PAST TENSE.
700 years before Jesus was born the prophet Isaiah was speaking about a human already alive (born) in his lifetime.
On top of that, when was Jesus ever a prince?
Per the Christian bible Jesus was born to a poor family and was never a prince or king. He was likewise never anointed as one (a messiah).
To top all of that off Jesus did not live in a time of peace either.
There is nothing in this passage that even suggests that the son (who has already been born 700+ years before Jesus) is in any way divine, let alone a deity.
The child in question is called a "peace prince."
Jesus was not a prince (he was supposedly an itinerant preacher, son of a carpenter).
Jesus did not live in a time of peace -- the Romans were cruel rulers and there were constant fights, tens of thousands of crucifixions of Jews by the Romans and eventually an open war where Jerusalem was destroyed, and eventually the Jews were exiled.
No, the term "peace prince" (prince of peace) does not fit Jesus.
Philo lived in the time of Pilate and Jesus (c. 25 BCE – c. 50 CE). He wrote about how non-peaceful the times were, and in particular how evil Pontius Pilate was in Legatione ad Caium "He feared they . . . might impeach him (Pilate). . .in respect to the his corruption, his acts of insolence, and his rapine and his habit of insulting people, and his continual murder of persons untried and uncondemned, and his never ending, and gratuitous and most grievous inhumanity."
The child who had been born and who was to be a prince in time of peace was King חִזְקִיָּ֫הוּ / Hizkiyyahu / (Hezekiah) who was about 13 years old when Isaiah spoke about him in this passage. In chapter 9 Isaiah is praising G-d for the future salvation of Jerusalem under Hizkiyyahu / Hezekiah -- who was already alive, but not yet ruling. Isaiah warns the people to not become arrogant in this time of peace -- or they will suffer the same eventual fate of the northern kingdom of Israel, which had been defeated and exiled.
In 713 BCE (the 14th year of Ḥizkiyyahu / Hezekiah's reign) there was an attack on Jerusalem which failed. After its failure there was peace for the remainder of his reign -- and indeed that peace lasted more than 100 years -- the longest period of continuous peace ever for the kingdom of Judah. He was indeed a peace prince / sar shalom.