Alan sits next to 4 phonetic neighbors — Allen, Allan, and Aaron are the closest matches by sound. Most share Alan's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"handsome"
"anointed one"
"to tame, to subdue"
"lover of hounds"
"dedicated to Mars"
"young dog, whelp"
"gift of Yahweh"
"he has heard, God has heard"
"gift of God"
"fair, white, bright"
"hunter"
"from Sebastia"
"born of fire"
"God will add, God will increase"
"strong and brave"
"strong, mighty"
"Priceless; of inestimable worth"
"keeper of the park, park ranger"
"ascended, high"
"one who is celebrated"
"red king, famous ruler"
Similar sound: These names share phonetic patterns with Alan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Celtic origins, giving them the same cultural heritage as Alan.
Rhythm: Alan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.