Mordechai sits next to 4 phonetic neighbors — Mordecai, Marcus, and Mordechai are the closest matches by sound. Most share Mordechai's Hebrew-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"follower/servant of Marduk (Babylonian deity)"
"vision of God"
"beloved of God"
"song, singing bird"
"YHWH is salvation"
"exalted father (earlier form Abram)"
"God is my help"
"noble eagle (adal + aro)"
"remembered by Yahweh"
"one who hears, God has heard"
"peace"
"God will provide, the Lord sees"
"his excellence, his preeminence"
"city of God (alternate interpretation)"
"mountain goat, to ascend"
"city of the moon"
"motion, movement"
Similar sound: These names share phonetic patterns with Mordechai — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Babylonian origins, giving them the same cultural heritage as Mordechai.
Rhythm: Mordechai is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.