Eric James Harvey is accused of trying to kill Mark Richard Harvey on May 6.
The 40-year-old was arrested after allegedly stabbing his 43-year-old sibling at the property where they both lived in St Andrews Road, Colwyn Bay.
During a short preliminary hearing at Caernarfon Crown Court, Eric Harvey spoke only to confirm his name.
Flanked by dock officers he listened intently as lawyers discussed the timetable for the exchange of documents with the judge.
Judge Merfyn Hughes QC directed that a further hearing, at which Harvey will be expected to enter a plea to the charge, be heard in July.
There was no application for bail and Harvey was remanded in custody.
Residents were alerted to an incident in the St Andrews Road area by the sound of the North Wales Police helicopter flying overhead and a large number of officers in the street.
Police later confirmed a man had been taken to hospital.
Senior investigating officer Detective Chief Inspector Gareth Evans said at the time that the incident was an “isolated” one which did not occur in a public place.
He added police inquiries were ongoing and appealed to anyone with information to contact police.
The victim was said to have sustained serious injuries which required hospital treatment but were not life-threatening