Quoting from Soorat al-Isra’ is also called Soorat Bani Isra’eel (read this full link for better understanding and full details.):
Soorat al-Isra’ is called Soorat Bani Israa’eel in two saheeh mawqoof hadeeths, in which it is the words of the Sahaabah (may Allah be pleased with them):
The first hadeeth was narrated from ‘Abd-Allah ibn Mas‘ood (may Allah be pleased with him), who said concerning (the soorahs) Bani Israa’eel, al-Kahf, Maryam, Ta-Ha and al-Anbiya’: They are among the best and earliest and they are among the first I received.
Narrated by al-Bukhaari, 4994
The second hadeeth was narrated from ‘Aa’ishah (may Allah be pleased with her) who said: The Prophet (blessings and peace of Allah be upon him) used not to sleep until he had recited Bani Israa’eel and al-Zumar. Narrated by al-Tirmidhi, 3402, who said: It is a hasan hadeeth. It was also classed as hasan by al-Haafiz Ibn Hajar in Nataa’ij al-Afkaar, 3/65; and it was classed as saheeh by al-Albaani in Saheeh al-Tirmidhi.
The scholars said that this soorah was better known by the name Soorat Bani Isra’eel at the time of the Sahaabah and Taabi’een
I don't think I can add anything or explain anything else.
I hope this answers the question.
Also read Are the names of the surahs a matter of tawqeef?
Allah knows best