Sporran chain advice needed

[M. A. C. Newsome]

The actual origin of the "belt loops" on kilts is indeed for the sporran strap. If you look at the way most early kilts are constructed ("early" here meaning nineteenth century) there are no belt loops. At some point, I'm going to say early-to-mid twentieth century (this is not a confirmed date as I have not really looked into it that closely) some kilt makers started making kilts with "sporran loops."

These were smaller than we are used to seeing belt loops on kilts, because they were made specifically for the more narrow sporran strap. They were used mainly for men with no hips to speak of, or larger waists than hips, as an aide to keep their sporrans from slipping down. (I've seen a few older kilts that had these very small loops in the back).

The story goes that some kilt wearers complained that these loops were not wide enough for their kilt belts and began requesting their tailors to make the larger. And so the trend of having large belt loops on your kilt began.

With that in mind, I don't see any reason not to wear your sporran strap through your belt loops if you like (assuming you have belt loops on your kilt at all).
Matt