14 baby names with a similar sound and feel to Halcyon.
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"a magical charm or spell; also a curse"
"Water of life; the distilled spirit drink"
"brave lion, lion-strong"
"compassion of God"
"raspberry (fruit)"
"king who speaks wisdom"
"my pride, my genius, my eminence"
"fortunate, successful"
"from the barley meadow (topographic)"
"Lofty; exalted; high mountain"
"destruction, ruin"
"time of peace, the appointed time"
"lone champion"
"Possibly lion (from Levon/Leon) or a modern creative invention"