14 baby names with a similar sound and feel to Gretha.
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"child of abundant grace"
"variant of Geraldine"
"lady, mistress of the house"
"of the sea"
"famous in battle (via Clothilde)"
"strong"
"dark-complexioned warrior"
"man of valor, super valor"
"invented American name of phonetic origin"
"sunray, shining light"
"light, sun (Igbo tradition)"
"garland, wreath of victory"
"good victory"
"famous"