The two were on honeymoon, having married last Thursday.
Dozens were overtaken by the flames in their homes, on foot or in their cars.
The bodies were entwined and severely burnt, an AFP photographer at the scene said.
The death toll jumped Tuesday morning after the Red Cross discovered 26 bodies on the lawn of a seaside villa in Mati.
"Residents and visitors in the area did not escape in time even though they were a few metres from the sea or in their homes", fire brigade spokesperson Stavroula Maliri said.
Ireland's ambassador to Greece, Orla O'Hanrahan, has confirmed Brian's death.
Dramatic video footage showed people fleeing by auto as the tourist-friendly Attica region declared a state of emergency.
Mayor of the Rafina-Pikermi area, Evangelos Bournous claimed he saw at least 100 homes and 200 cars in flames.
Her home is surrounded by dry pine trees.
There are no reports of any other Irish people being caught up in the disaster.
A firefighter reacts as a house burns during a wildfire in Kineta, near Athens.
Yannis Stratikopoulos of the civil protection agency said it is too early to speculate on what caused the fires.
At least 74 people have been killed, while dozens more have been injured.
Officials said the fires spread unpredictably and took people by surprise.
"People are shocked, lost".
Ramaphosa makes it rain as he secures $14.7-billion from China
The rand climbed as much as 1.2 percent against the dollar and was 0.9 percent higher at 13.3447 at 2:30 p.m.in Johannesburg. They were speaking at a three-day meeting of BRICS leaders in Johannesburg, South Africa .
Rescuers and volunteers help local people evacuate the village of Mati during a wildfire near Athens, on July 23, 2018.
In all, 47 brush and forest fires broke out across Greece on Monday and early Tuesday, with a lot of them quickly extinguished, the fire department said.
The Greek government has asked the European Union for help fighting the fires.
Hundreds of people ran to beaches as gale-force winds fanned the flames.
Later on Tuesday, the Greek Foreign Ministry thanked Turkey and Macedonia for their offers of help.
North Atlantic Treaty Organisation head Jens Stoltenberg offered the alliance's full solidarity with Greece, whose government earmarked financial aid for victims' relatives.
In the north, more than 300 firefighters, five aircraft and two helicopters were mobilised to tackle the "extremely difficult" situation, Athens fire chief Achille Tzouvaras said.
Interior Minister Panos Skourletis said the priority was to extinguish a fire still burning in Kineta, 50 kilometers from Athens.
Near the town of Marathon, several residents fled to safety along the beach, while some 600 children were evacuated from holiday camps in the area.
A third fire started in Hania.
"I'm concerned at the simultaneous outbreaks both east and west of Attica", added Tsipras, who later cut short his trip overseas and was scheduled to return to Greece.
Emergency services were banking on a drop in the wind but the forecast for the region - which has experienced temperatures topping 40 degrees Celsius (104 Fahrenheit) - suggest conditions would remain challenging into Tuesday. Forest fires are also raging in Sweden. "We couldn't see anything", he said of coastal towns consumed by fire and billowing smoke.
Fires have raged for five days in Latvia, destroying more than 800 hectares in the Baltic state's western regions.
The German Meteorological Service DWD warned of a significant risk of fires in fields and forests due to drought.
"Then the fire was all around us", Stavrinidis said.