וַיֹּֽאמֶר־ל֥וֹ אֱלֹהִ֖ים שִׁמְךָ֣ יַעֲקֹ֑ב לֹֽא־יִקָּרֵא֩ שִׁמְךָ֨ ע֜וֹד יַעֲקֹ֗ב כִּ֤י אִם־יִשְׂרָאֵל֙ יִהְיֶ֣ה שְׁמֶ֔ךָ וַיִּקְרָ֥א אֶת־שְׁמ֖וֹ יִשְׂרָאֵֽל׃
And God said to him: Your name is Yaakov; your name shall no longer be called Yaakov, but Yisrael shall be your name. And He called his name Yisrael.
Torah Temimah points to Berakhot 13a.
לא יקרא שמך עוד יעקב כי אם ישראל — מלמד שאין קורין לו יעקב אלא ישראל.
“Your name shall no longer be called Yaakov, but Yisrael” — this teaches that one does not call him Yaakov but Yisrael.
The Gemara discusses the permanence of the name change.
Derash on the renaming (Bavli).
The name Yisrael is to be the primary designation, not merely an additional name.