sickwithsin's list "Tricky Pronunciations" of 2 great name ideas: Evadne - Áine!

Tricky Pronunciations

In Greek mythology, Evadne was the daughter of Poseidon. Evadne also appears in literature (Mary Shelley's "The Last Man") and has a pop culture reference as the cousin of Wonder Woman. A more unusual alternative to other Greek "-ee" names like Ariadne, Daphne and Penelope. The trendy "Ev" sound makes this a lovely choice in a world of Evelyns, Evangelines and Everlys.

Evadne

Similar in sound to Anya and Enya, Áine is a mythical Irish choice, associated with the goddess of summer, wealth, beauty, love, and fertility. It is a familiar choice in Ireland and Northern Ireland, where it flits in and out of the Top 100, while in England and Wales, it was a Top 1000 choice back in the 2000s. 
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Associated with County Limerick and the village and hill Knockainey, which is name for her, the goddess was also connected to the sun, red mares, midsummer, and agriculture, making this a fitting choice for a summer baby. It also gives the name a sweet yet outdoorsy feel. 
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Pronounced as awn-yuh or an-ya depending on regional dialect, the name has also been Anglicized to Aine. 