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As you can see -ica names were very popular 50-60 years ago. They're really just diminutives, so I guess they'd fit with the current British trend of giving kids nicknames as full names (Gracie, Evie, Alfie, Freddy, etc. are quite common in UK BAs).
I have in my family: Stefica, Dragica, Danica, Anica, Barica, Nada (goes by Nadica), etc.
I have in my family: Stefica, Dragica, Danica, Anica, Barica, Nada (goes by Nadica), etc.