Answer
The process for this differs depending on the age of your child.
The Gender Recognition Act 2015 allows individuals over the age of 18 to legally self decare their gender identity by applying for a gender recognition certificate (GRC). A person can also change their name along with their gender marker through this process, if they like. The GRC form and more information is available on Gov.ie
It is also possible for 16–17 year olds to apply for a GRC. Parental/guardian consent is required, as well as a certificate from a medical practitioner and a psychiatrist. A parent/guardian must then apply to the Circuit Family Court with this consent and application form. These forms can be found on courts.ie.
If your young person is under 16 years old, they can still have their name changed; 14-17 year olds can legally change their name via deed poll. Young people will need consent from both parents to carry out a deed poll. There is more information about this here and information about people under the age of 14.
If you require any support with the paperwork please get in touch with our Family Support, we would be happy to support.
Thanks,
Jen