Celine

Also of Swedish, Norwegian and Modern Italian usage—as seen on the charts.
https://www.behindthename.com/name/celine/top/norway
https://www.behindthename.com/name/celine/top/sweden
https://www.behindthename.com/name/celine/top/italy

Also Swedish, Norwegian and Danish: https://www.nordicnames.de/wiki/Celine

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Also Dutch: https://www.meertens.knaw.nl/nvb/naam/is/Celine

Also Walloon: https://wa.wikipedia.org/wiki/Pitit_no_walon
https://wa.wikipedia.org/w/index.php?search=Celine&title=Sipeci%C3%A5s:Cweri&profile=advanced&fulltext=1&ns0=1

The actual Polish form of this name is Celina, but last year (2019) 2 girls in Poland were given the name Celine as a first name, and the name landed #668 in the ranking. It was not used as a middle name.