He applied for and received his Irish citizenship while living in Paris in 1992.
Both his parents hold Irish citizenship and he can compete for Ireland in international competitions.
He became an American citizen in 1994, retaining his Irish citizenship.
The adoption of his mother gained her the right to Irish citizenship and he was eligible.
Among those who have had honorary Irish citizenship conferred on them are:
Irish citizenship cannot be lost by the operation of the law of another country.
In 2001, he became an Australian citizen alongside his Irish citizenship.
It is difficult to put an exact figure on the Irish citizenship based across Continental Europe.
He acquired Irish citizenship in 1952 and became an art professor.
He is currently going through the process of obtaining Irish citizenship.