Leo is already Latin: it's the Word for "lion".
It appears in the following forms:
singular
- nominative/vocative leo ("[a/the] lion" - subject)
- genitive leonis ("of [a/the] lion")
- dative leoni ("to/for [a/the] lion")
- accusative leonem ("[a/the] lion" - object)
- ablative leone ("from/by/with [a/the] lion")
plural
- nominative/vocative leones ("[the] lions" - subject)
- genitive leonum ("of [the] lions")
- dative leonibus ("to/for [the] lions")
- accusative leones ("[the] lions" - object)
- ablative leonibus ("from/by/with [the] lions")
