Anakin sits next to 4 phonetic neighbors — Aiken, Anicin, and Anikan are the closest matches by sound. Most share Anakin's American (George Lucas, 1977)-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"invented name, no established etymology"
"modern American invention"
"untamed, wild-natured"
"western enclosure"
"renowned warrior"
"dweller near the ridge"
"slender"
"the ram"
"man, the light"
"from Brix (place name)"
"elder, more important"
"fifth, born fifth"
"true, faithful"
"land where rye is grown"
"pure, without blemish"
"world-encircling waters"
"watchful, vigilant (via Casey influence)"
"modern American invented name"
"to live, to dwell"
"battle strength"
"invented blend name, no classical meaning"
Similar sound: These names share phonetic patterns with Anakin — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have American (George Lucas, 1977) origins, giving them the same cultural heritage as Anakin.
Rhythm: Anakin is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.