Vana's list "Adverbs" of 20 great name ideas: Manly - Verily !

Adverbs

Some Adverbs could actually work as names: Merrily, Frankly and Truly

Manly is an unusual masculine name deriving from Old English, literally meaning 'masculine' or 'resembling a man.' As a given name, it emerged during the Victorian era when virtue names and descriptive names were fashionable. Though uncommon today, Manly experienced modest popularity in the United States in the late 19th and early 20th centuries. The name carries obvious associations with masculinity, courage, and strength. Some bearers may have been named after Manly Hall, a notable Canadian author, or in reference to Manly Beach in Australia. The direct meaning can make it feel somewhat heavy-handed in modern contexts, which has contributed to its decline. Today, it's an extremely rare choice that stands out for its straightforward meaning.

Manly

Slightly sing-song and very joyful, with a hint of Melody, a bit of Felicity, and a dash of Truly thrown in, Merrily was briefly popular in the 1940s. 
 
It can be considered a smoosh name, blending elements of Mary and Lee - which might explain why it was popular in the 40s, when Marilyn and Marilee were on trend - or it can be considered a word name, giving it a fresher vibe.
 
2023 saw spelling variation, Merrilee, appear on the charts again for the first time since the 2000s and with word names trending, perhaps Merrily may make a resurgence in the future.

Adverbs

Manly

Merrily

Mightily

Naturally

Newly

Often

Quicker

Quickly

Richly

Royally

Shyly

Sincerely

Soon

Sunnily

Surely

Swiftly

Truly

Uniquely

Vastly

Verily