Among them is former Moderator of the Church of Scotland General Assembly Dr Andrew McLellan.
Naming Trident as the reason for opting out of the UK he said: "September 18th is a once-in-a lifetime opportunity to remove the worst thing in Scotland.
"Speaking against nuclear weapons is good, campaigning against nuclear weapons is good, and praying for their abolition is good.
"But what will change everything is voting 'Yes' in the referendum.
"Living in a Scotland free of nuclear weapons will make everything else better."
A Better Together spokesman said; "People of all faiths and none are saying no thanks to separation because we don't want the risk and uncertainty that comes with leaving the UK.
"By saying no thanks to separation people in Scotland can have the best of both worlds, more decisions made in Scotland, distinct Scottish institutions and the strength, stability and security of being part of the bigger UK."
The Church of Scotland has said it will remain neutral throughout the campaign.
It's committed to working for reconciliation after the vote on September 18th.