“truely – archaic spelling of truly” – en.Wiktionary.org

• https://en.wiktionary.org/wiki/truely
• https://en.wiktionary.org/wiki/Category:English_archaic_forms – if you want to check your vocabulary

I had no idea, that “truely” is rather outdated. My e-mail spellchecker underlined it in read, so I thought, I should look it up.