SJS, no, we have no family history of celiac at all. We only found out she had it because she was screened for it due to poor growth. They screened her for all kinds of problems, like cystic fibrosis & Turner’s syndroms, so it was a great relief b”h that the diagnosis required only a change in diet.
Gluten intolerance (I prefer to call it that because as long as one sticks to the diet there’s no manifestation of “disease”) does tend to run in families and is more common in certain ethnic groups (it’s much more common in Ireland for example). I don’t think the heritability (is that a real word?) is well-understood though. Most celiacs I know have multiple first degree relatives with celiac but I know other families like ours, with only one gluten-intolerant member.