Rick sits next to 4 phonetic neighbors — Ricki, Rikki, and Nick are the closest matches by sound. Most share Rick's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"powerful ruler"
"pure, clear"
"sticks of fire"
"a simple bound shoe; the sandalwood tree"
"farm or settlement near the shire"
"Grace, favor"
"beloved friend, dear one"
"invented ornate feminine name"
"violet flower"
"Combination of Hugh (heart, mind, spirit) + the feminine suffix -lene"
"winged, nourished"
Similar sound: These names share phonetic patterns with Rick — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Rick.
Rhythm: Rick is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.