What is the ruling on naming my daughter Iwona? May Allah reward you.

We have not found a meaning for the aforementioned name in Arabic lexicons, and it is likely a foreign name. A Muslim should not name their child with foreign names unless their meaning is known, as it might contain a bad meaning or a slogan that contradicts religion and morals. The ruling on a name depends on knowing its meaning or intent. If it is known that it does not contradict religion and morals, and is not exclusive to the people of a specific creed, then there is no harm in naming with it.