Where does “Danube salmon” come from?

Danube salmon (English) comes from English Salmon, from Middle English samon, from Anglo-Norman saumon, from Old French saumon, from Latin salmō, from Armenian Իշխան, from Old Armenian իշխան, from Undetermined xšāna-.

Ancestry of “Danube salmon”, step by step

Danube salmon traces back through two separate lines of ancestry.

via English Salmon

StepLanguageWordMeaning
1EnglishSalmonA placename
2Middle EnglishsamonAlternative form of samoun
3Anglo-Normansaumonsalmon
4Old Frenchsaumonsalmon
5Latinsalmōsalmon
6ArmenianԻշխանprince, ruler, ishkhan
7Old Armenianիշխանprince, ruler, ishkhan
8Undeterminedxšāna-—

via English Danube

StepLanguageWordMeaning
1EnglishDanube—
2Middle FrenchDanube—
3Old FrenchDanube—
4LatinDānubius—
5Proto-CelticDānowyos—
6Proto-CelticDānu—
7Proto-Indo-Europeandʰenh₂-to set in motion; to flow
Every word from Undetermined xšāna- →Every word from Old Armenian իշխան →Every word from Armenian Իշխան →