She came into the world too early and only stayed a short while.
Yesterday, Stephen Connolly watched as the tiny white coffin carrying the body of the daughter he had never met began its journey to her final resting place.
Baby Catherine's coffin was placed alongside that of her mother, Roisin (39), who perished in the same three-car crash just across the border on December 27.
Baby Catherine was not due until April but died after her mother passed away from her injuries. Stephen was supported at the funeral home in Ballybay, Co Monaghan, by Catherine Langan, Roisin's mother and his daughter's namesake.
Their funeral Masses will take place in St Mary's Church in Fanad at 1pm today, the same church where the couple married less than eight months ago. Roisin and baby Catherine will be buried side by side in the adjoining cemetery.
At the same time, in Nobber, Co Meath, the funeral Mass was taking place of another of the victims of the horrific crash, Glen Curtis (28), who perished alongside his best friend, Paul Carroll (27), from Kingscourt in Cavan.
Rev Seamus Houlihan spoke of the close friendship the pair had shared all their lives.
Paul's funeral takes place today.