'Aphidius' originates from New Latin, specifically derived from the Greek word 'aphis' where 'aphis' meant 'aphid', combined with the Latinized suffix '-ius' used to form genus names.

'Aphidius' was coined in modern scientific (New Latin) nomenclature from the root 'aphis' (Greek/Latin) and the suffix '-ius', becoming the established genus name 'Aphidius' in entomological taxonomy.

Initially formed to indicate 'related to aphids' (i.e., associated with aphids), it has come to denote a specific genus of parasitoid wasps that attack aphids.