The Goldeneye star's adopted daughter Charlotte, 41, died after a three-year battle with ovarian cancer on 28 June.
Brosnan's first wife - Charlotte's mother, Cassandra - died of the same disease 22 years ago.
This has all brought up sad memories for the 60-year-old actor.
'He is beyond devastated'
Bron Roylance - a close friend of Brosnan - told People magazine: "Charlotte's illness came with darkness because Pierce was re-living the past. He had to re-live the whole nightmare of this horrific disease. Pierce is dealing with Charlotte's death but in reality he is beyond devastated."
However, Pierce is getting through it with the help of his second wife, Keely Shaye Smith, whom he married in 2001.
Bron added: "It's true love. During the tough times they are both beacons of strength. Pierce uses the words, 'Rise up'. He's got an inner quality that allows him to continue.
"He will continue to be a husband and a father. He will continue on with his life. That's Pierce: one foot forward. Always."