Mercy sits next to 3 phonetic neighbors — Percy, Mersey, and Marcy are the closest matches by sound. Most share Mercy's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"compassion, forgiveness, clemency"
"from the clearing"
"young man"
"the king"
"leopard, tiger (possible Arabic root)"
"dark red, crimson"
"neat, lovely, and blessed"
"worthy, of value"
"great, magnificent, mighty"
"battle, fighter, combatant"
"hat maker, cap maker"
"God hears, gift of God (possible intention)"
"strength, God is my help"
"son of Aodh (fire)"
"ray of light + God is gracious"
"hollow stone, hollow hill"
"he gave"
"my God is majesty, God is splendor"
"supplanter"
"God is gracious"
Similar sound: These names share phonetic patterns with Mercy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin via Old French origins, giving them the same cultural heritage as Mercy.
Rhythm: Mercy is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.