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"
"mild, merciful"
"famous land"
"wanderer"
"God will increase"
"high son, chieftain"
"one who works the earth"
"defender of men (short for Alexander)"
"ancestor descendant"
"yew bow warrior; archer"
"Yahweh saves"
"victory"
"gift of Yahweh"
"fifth born"
"given by Yahweh"
"the frenzied one, the inspired"
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.