Chesney sits next to 4 phonetic neighbors — Chessie, Kelsey, and Kensey are the closest matches by sound. Most share Chesney's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"oak grove, oak meadow"
"gift of God's grace"
"dawn, bright star"
"pure"
"noble strength with grace"
"thirst, longing"
"meadow of oaks"
"free woman, strong"
"God is my strength"
"noble, nobility"
"dark-feathered bird"
"age, period of time"
"supplanter, one who follows at the heel"
"dark one, man from the dark sea"
"pledged to God"
"from Scotland"
"one who works with tannin"
"grace from the meadow"
"uncertain — possibly Native American origin"
"people of a different speech"
"wise judgment, knowledge, discernment"
Similar sound: These names share phonetic patterns with Chesney — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French/Norman origins, giving them the same cultural heritage as Chesney.
Rhythm: Chesney is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.