100% it is The Holy family. The parish was founded in 1868 and the present church was built in 1884. The nearest Catholic church to Mossend is The Sacred Heart in Bellshill but if it states "Mossend" on your certificate it is definitely The holy Family. It is a beautiful church, very well maintained by Father Jim Grant, the present incumbent.
The Catholic church in general was very rarely, if ever, mentioned by specific name in those days, just as the officiating priest was barely recognised by his proper title, usually "J Bloggs, CC" or some such description. Other denominations usually fared better.