A dad-of-three died after suddenly collapsing on Christmas Eve only four months after the birth of his youngest child.
Marc Williams clung to life for two days, but doctors told his devastated family nothing more could be done and his life support was withdrawn on Boxing Day.
His fiancée, nursery nurse manager Amy Johnson, said: “I just want [people] to know how much I loved him.
“He was always my rock, and he was the best dad ever.”
The Liverpool Echo reports the couple had welcomed their youngest child, baby Oliver, in August.
Marc, a 41-year-old stay-at-home dad from Wavertree, was a trustee of Liverpool and Manchester Railway Trust where he was a popular and respected figure.
Fellow trustee and close friend, Paul O’Donnell, said Marc had been at home when he “suddenly dropped” without warning.
Liverpool and Manchester Railway Trust)
He was rushed to Liverpool Heart and Chest Hospital at around 5.45pm, where he was diagnosed with a brain aneurysm.
Despite some slight signs of improvement over the night into Christmas Day, by December 26 doctors realised that there was no detectable brain activity and no chance of recovery.
Paul said: “I have known Marc since 2015 and in all that time I have never seen him angry or upset.
“He was just one of those enthusiastic and joyful people.
“He was very diligent and he was devoted to Amy and the kids. Amy was the main breadwinner and he used to call himself the CEO of Daddy Day Care.”
Paul said Marc, the grandson of a train driver, was known for his ability to find new information about the Liverpool to Manchester railways hidden in archives. and the pair enjoyed trips to scour the records of libraries across England.
He said: “One thing he did have was ADHD [attention deficit hyperactivity disorder], so he was really chatty and his brain was always working, and he would employ that in the service of the trust.
“It would be ‘I have found this report’ or ‘I have found this article’.
“Marc wanted this work to be his legacy, and we are looking at ways to make that happen.”
Despite his sunny disposition, Marc had endured a harrowing tragedy around six years ago when he and Amy lost a baby girl, named Isobel, shortly after she was born.
Paul said he did not show his suffering and had “stayed strong” for Amy and their oldest son John-Paul.
To help the family get through the difficult times ahead, Paul set up a JustGiving crowdfunding page for donations.
On the page, which has already attracted £2,500 to help the family, Paul wrote: “This is the second time I am starting a Just Giving page for Marc Williams.
“Six years ago he and his fiancée, Amy, lost their second child Isobel mere days after coming into the world.
“It is now my duty to ask for support again as Marc himself has gone to join Isobel amongst the stars.
“Marc leaves behind his graceful fiancée, Amy and three beautiful children, John Paul, Anwen and baby Oliver, who was only born this August.
“They are a family that has endured far more than anyone should have to endure.
“I do not have a fixed goal for this fund, it is just however much it ends up being to support Amy and the children at this impossible time. It is just in memory of one of the nicest and gentlest people I have known, a good heart and a devoted partner and father.”
Anyone wishing to donate can do so here.