Power sits next to 4 phonetic neighbors — Powell, Tower, and Bower are the closest matches by sound. Most share Power's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"strength, authority, force"
"land by the winding stream"
"fair warrior, fair hero"
"noble, exalted, lofty"
"son of Roderick"
"gathering place, pool"
"modern invented name, combination of Tae and -vion"
"lively, merry"
"variant of John"
"court officer, legal summoner"
"God is gracious"
"valley of willows"
"raven warrior"
"hope, aspiration"
"from Dyce, Aberdeenshire"
"modern coinage, possibly 'thankful lion'"
"rocky land, land of rock"
"of the Jordan River"
"fabric finisher (occupational)"
"noble power"
Similar sound: These names share phonetic patterns with Power — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French/Latin origins, giving them the same cultural heritage as Power.
Rhythm: Power is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.