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.
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"God is gracious"
"God will increase"
"yew tree army"
"judgment army"
"Isle of Skye, Scotland"
"enclosed pasture, fortified place"
"eagle friend"
"wanderer"
"dweller in the woods"
"proclaimer of peace"
"the very greatest"
"ancestor descendant"
"powerful ruler of the household"
"short form nickname"
"horn, strong-willed"
"godly ruler"
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.