Mikolaj Wilk, 35, died after he was attacked at his home in Maglin, Ballincollig. The woman, who is in her early 30s and also from Poland, sustained non-life threatening injuries.
Two young children, aged under six years old, were also in the property at the time but were uninjured, as was another woman in his early 30s.
Mr Wilk died later in hospital, while his partner remains in hospital and is undergoing treatment for her injuries.
The Gardai have opened a murder investigation into the killing of Wilk and are appealing for information from anyone in the area, who may have noticed suspicious or unusual activities that night.
While police did not mention the weapons used in the brutal attack and only called it a "serious assault", TV3 is saying that the gang had used machetes in their attack.
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Forensics officers are now examining the property and where the auto was found.
Setting up a GoFundMe page to help the family, Ms Deryn said Mikolaj was "a caring husband and loving father", and asked for everyone to help his wife right now. They believe the auto was a BMW 3 series.
After the armed men fled the scene, a vehicle was found burned out in the Waterfall area around five miles away.
A post-mortem examination is scheduled to take place later on Sunday.
Gardai, who have launched a murder inquiry, responded to the incident at 3.17am on Sunday.