Shanlee sits next to 3 phonetic neighbors — Shanley, Shelley, and Mandy are the closest matches by sound. Most share Shanlee's Modern American-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Creative blend of Shannon (old river) and lee (meadow), or simply an invented melodic name"
"God is my oath"
"who is like God (via Michelle)"
"palm tree, date palm"
"do not"
"divine, celestial"
"God is gracious"
"Joyful meadow; combination of Jay and Lee"
Similar sound: These names share phonetic patterns with Shanlee — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Modern American origins, giving them the same cultural heritage as Shanlee.
Rhythm: Shanlee is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.