Jan sits next to 4 phonetic neighbors — John, Jon, and Yan are the closest matches by sound. Most share Jan's Dutch-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is gracious"
"eagle friend"
"victory of the people"
"home ruler, lord of the estate"
"gentle, lenient"
"defender of men (short for Alexander)"
"destroyer of peace (literal)"
"forefather"
"brave people, bold folk"
"famous ruler"
"short form nickname"
"farmer, earth-worker"
"may He add another son"
"godly ruler"
"dweller in the woods"
"high son, chieftain"
"connected to Damia, goddess of the harvest"
"The sky, heavens"
Similar sound: These names share phonetic patterns with Jan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew (via Latin Johannes) origins, giving them the same cultural heritage as Jan.
Rhythm: Jan is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.