Short answer: the US and others allow a name change request at the naturalisation oath, reflected on the certificate. Then update social security, licence, passport and banks. Informal “preferred names” lack the same legal effect.
Name Change at the Naturalisation Ceremony
Written by Global Immigrate consultants · Reviewed by Oscar Yip, Founder & Managing Director
Summary
Some countries allow a legal name change at the oath; then update all IDs.
FAQ
Must I change?
No — optional.
Cost?
May be built into the ceremony process; later ID replacements cost extra.
Only romanisation change?
Follow the exact spelling on the order/certificate.