Dual Citizenship in the European Union: trends and analysis (2010-2020) Table 2 – Citizenship constellations in the EU-2891 Cells that are marked grey are wholly permissive constellations. Cells that are unmarked are (partially) nonpermissive constellations. Cell depicts number of citizens of country in row header who acquired citizenship in country of column header. Country where citizenship is acquired Original citizenship Austria Belgium Bulgaria 9 Austria Croatia Cyprus Czechia Denmark 0 8 1 2 7 0 0 1 1 4 3 113 25 21 1 22 4 0 0 Belgium 9 Bulgaria 147 554 Croatia 251 16 0 Cyprus 0 3 0 0 Czechia 66 36 1 1 2 Denmark 0 18 0 0 1 0 92 Estonia 5 12 0 0 1 1 11 Finland 0 10 0 0 0 0 35 France 3 869 0 0 5 0 41 Germany 265 244 2 15 6 8 168 Greece 7 200 4 1 369 3 7 Hungary 258 112 0 2 1 2 16 Ireland93 0 28 1 0 2 0 12 Italy 50 1.352 1 3 2 3 30 Latvia 2 45 0 0 11 1 20 Lithuania 11 26 0 0 5 1 21 Luxembourg 0 21 0 0 0 0 0 Malta 0 0 0 0 0 0 2 Netherlands 13 1.064 0 0 2 1 20 Poland 150 1.528 5 4 13 45 122 Portugal 3 272 0 0 1 0 11 Romania 456 2.219 0 8 103 51 49 Slovakia 197 60 0 2 5 346 9 Slovenia 9 54 12 0 16 0 1 2 94 Spain 4 706 0 0 0 0 23 Sweden 2 14 0 3 4 3 185 UK 40 1.045 0 2 658 27 143 91 Data for Romania is unavailable. Source: European Commission, “Acquisition of citizenship (2018)” [data file], Eurostat, 2020, via <eurostat.ec.europa.eu>. 92 Estonian citizens by birth can retain citizenship upon acquisition of a foreign citizenship (see Section 3). 93 Only citizens by naturalisation can be deprived of citizenship upon acquisition of a foreign citizenship (see section 3). 94 Loss of Spanish citizenship upon acquisition of a foreign citizenship can be prevented by making a declaration. 26 RSCAS/GLOBALCIT-Comp. 2020/4 - © 2020 Author