Who Married Your Ancestor's Siblings?

A "quick" post on the Facebook wall for Genealogy Tip of the Day was too short and perhaps a little confusing, so I decided to make a longer post here. 

Sometimes we are fortunate that a minister married our ancestors and from that name a denomination can be determined, or at least guessed at--depending upon whether or not we can find out the affiliation of the minister. 

Don't forget that the marriages of your ancestor's siblings should also indicate who officiated at their marriages and if the religious affiliation of those individuals can be determined it may be that your ancestor was affiliated with the same church.

A little bit of a long shot, but a slightly different spin on the "researching the siblings can help." Sometimes that help is not direct.