Erminia
er-MIN-ee-uh
A literary feminine name with roots linked in old sources to “lordly” and to the Germanic name family of Arminius/Hermann.
Meaning
The 19th-century name books in your excerpts connect Erminia with Latin 'lordly,' while also tracing it through the Roman Herminius and back to Arminius/Hermann in Germanic tradition. In practice, the name has a layered scholarly history: it appears as an Italian and literary feminine form, with etymologies that old authors related either to nobility or to the Arminius name-family.
Origin
LatinGermanicItalianfeminine
Fun fact
Tasso helped popularize Erminia in Italy by using it for a heroine in Jerusalem Delivered, and later writers kept it alive in opera and fiction.