Hispanis
Hispanis is a Latin form of Hispanus, meaning “Spanish; (Hispani) the Spaniards”. It is the ablative plural masculine adjective.
Found 50 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 5.26.3: Cum celeriter nostri arma cepissent vallumque adscendissent atque una ex parte Hispanis equitibus emissis equestri proelio superiores fuissent, desperata re hostes suos ab oppugnatione reduxerunt.
All forms of Hispanus (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.