Krystal sits next to 4 phonetic neighbors — Crystal, Kristal, and Christal are the closest matches by sound. Most share Krystal's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"clear ice, rock crystal, quartz"
"dark-complexioned, dark beauty"
"pure"
"little king, royal one"
"heavenly, divine"
"beauty, loveliness"
"gracious meadow"
"rich reddish-brown tropical hardwood"
"elf ruler, supernatural power"
"dearness, preciousness"
"Wished for child"
"wealthy, gift"
"goddess of the hunt and moon"
"foreign, true"
"noble and gentle"
"God is gracious"
"dream, vision (possible Aislinn influence)"
"descendant of Raighne (Irish clan)"
"land of the Scots"
"commander, sovereign"
"gentle strength, mild power"
Similar sound: These names share phonetic patterns with Krystal — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Krystal.
Rhythm: Krystal is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.