Extended Strong's Greek Lexicon (Abbott-Smith based)
whether
Usage: 1. = ἦ τοι, now surely, truly, verily , (Iliad by Homer); after ἀλλ᾽ εἰ . ., nevertheless , (Iliad by Homer) 2. = ἤτοι, either in truth , followed by ἤ, or , (Herdotus Historicus), etc. (ML)