pi.shon is the proper name of the first river said to flow around the land of Havilah.

The attested use names the first river, described as flowing around the whole land of Havilah in Genesis 2:11.

1. Name of the first river · dominant

   In Genesis 2:11, the form is marked as a proper noun in the clause naming “the first”; the APB renders the verse, “The name of the first is Pishon,” and describes it as flowing around the whole land of Havilah.

   Genesis 2:11

In the Anselm Project Bible: In Genesis 2:11, the APB presents the name as “Pishon” in identifying the first river. The verse is read as a whole, but its river description confirms the verse’s naming context.