Gardaí searching for businessman Sean Quinn's nephew Peter Darragh Quinn have called to a number of his known addresses, but have so fair failed to locate him.
A warrant was issued for his arrest yesterday, after he failed to appear in court.
Peter Darragh Quinn and his cousin, Sean Quinn Junior, were each sentenced to three months for trying to hide a €500m property empire from the former Anglo Irish Bank.
Sean Quinn Junior, last night began his three-month sentence for contempt. He will serve his three-month jail sentence in the low-security training unit of Mountjoy Jail, a Prison Service spokesman said.
Sean Quinn Senior, once Ireland's richest man, was also found guilty of the offence by the High Court in Dublin three weeks ago but the 65-year-old was spared punishment for now to give him time to comply with court orders and unravel the moves that carved up the family's international property empire.
He clutched a handkerchief and bowed his head as the High Court yesterday ordered his son be locked up.
The arrest of his nephew, the son of former GAA president Peter Quinn, was ordered after he failed to turn up for the hearing, leaving a message that he was sick.