Good Character is a website with examples of ethical and moral dilemmas. One that concerns loyalty is David's story.
Confucianism is heavily steeped in directives on living a virtuous life. Loyalty is one of the most important virtues to Confucius. Read more about this religion or philosophy at Patheos, a website that encourages understanding of different religious traditions.
Here is an article from Interconnections, a Unitarian Universalist publication, about the Unitarian Church of Harrisburg (Pennsylvania)'s purchase of new property.