Helenka
A Slavic diminutive form of Helen. The suffix ka has the same value as ella, ette, etc.
Hedona
“Utter delight,” from the Greek lie- done, delight. Compare the term “hedonism,” the doctrine that pleasure is the principal good in life and should be pursued to the exclusion of all else.
Harelda
“Sea duck.” Of Scandinavian origin.