In the 70’s, perhaps during confession or another formal scripted ceremony, but I honestly can’t recall. Certainly, never in conversation and not in the last 25 years.
Going to a diocese school, we students grew to know the parish priests pretty well. All were normal young men, to the best of my knowledge, quick with humor and pretty informal when out of their official role. They’d usually address us by our first name if they knew it, and we’d, in turn, call them Father X.
Never addressed as “my child” or “my son”. We did however have Father Moran who had the most mesmerizing Irish brogue.
I always thought they used that form of address when they couldn’t remember your name. Much the same as an elderly Englishman using, “My dear boy…”
No on the “my child/son.” Yes on the Irish accent.
Three of the last 4 priests at the church we attend in San Diego have been Irish.
Well, the vast majority of American Catholic Churches are Latin Rite, so, yeah…
But no, I mean I have seen right to left several times in movies or TV shows. If not outright stated, I still highly doubt they were intending an accurate portrayal of a Maronite church. Sorry, I saw one recently, but can’t recall any specific names. Probably in some of those exorcism crap movies.
17 years of Catholic school.
5 parishes.
30 + years of Active Catholicism.
Never been addressed in such a manner.
(I was flipped off by a priest in HS once though…)
Grew up Catholic. Went to Catholic schools about 50% of the grades. Was an alter-boy (when Mass was still in Latin, no less). Never heard a priest say that.
altAr. AltAr! Unless you mean you had several other bodies you wore depending on your mood… runs after John Mace brandishing a fully-loaded censer
Nava, my child, chill!!! 
Yes Mom.
Do I get ice cream if I’m good?
I’m not Catholic, but I went to a Catholic high school my last two years because I was a bully who needed discipline, and a Catholic college because I grew to simply love the Christian Brothers. Still do.
Anyway, no priest, nun, or Brother has ever addressed me as “my child,” nor did I ever hear any of my classmates addressed as such. In high school everyone was on a last-name basis; in college it was all first names (except for the guys who’d gone to the high school, who often stayed with last names among themselves for obvious reasons).
It might be a faulty memory on my part but I seem to remember the bishops using the term “my child”, or visiting priests that were considered dignitiatires for some reason.
Priests and nuns addressing people as “my child” is one of many staples of TV shows and movies dealing with Catholics, even though I have NEVER seen a single real priest or nun do that.
There are countless other things like that- in my entire life, I’ve only heard ONE priest ever ask, at a wedding, if anyone had any objections. And that priest was an Episcopalian who’d converted.
I’ve been to Catholic churches a few times in the last couple years. Never heard the priests say that. Of course this was in SE Virginia with fairly young priests.
Good point, of course. I do remember that Fr. [name omitted] did speak the Basque language, and that Spanish-speakers I knew said to me that he had an accent when speaking Spanish, but that may well have been because the Spanish-speakers I knew back then were immigrants, or the children of immigrants, from South and Central America, or Cuba. Certainly he would have had a different accent from them, but it may well have passed unnoticed in Spain, or at least in his neck of the woods.