ye.shu.run is used as a proper name in addresses and descriptions involving Israel and Jacob.

The term is consistently a proper name in clauses concerning Israel and Jacob: it is addressed, linked with the gathered tribes, and named alongside Jacob.

1. Proper name for the people addressed or described · dominant

   All four occurrences are tagged Noun · Proper. In Deuteronomy 32:15 the APB renders a figure who grew fat, kicked, and abandoned the God who made him; in Deuteronomy 33:26 it renders a direct address, “O Jeshurun.” In Deuteronomy 33:5 the name occurs where the tribes of Israel gather in unity, and in Isaiah 44:2 it stands alongside “my servant Jacob” and “whom I chose.”

   Deuteronomy 32:15Deuteronomy 33:26Deuteronomy 33:5Isaiah 44:2

In the Anselm Project Bible: The APB presents the name as “Jeshurun” in Deuteronomy 32:15, Deuteronomy 33:26, and Deuteronomy 33:5, while Isaiah 44:2 places it after “my servant Jacob.” Its wording cannot establish a finer distinction.