FWIW, ATF policy is an evolving process.
Once Upon A Time (actually, prior to the acknowledgement a few years ago that Trusts were acceptable NFA ownership vehicles), abbreviations of first or middle names were commonly used. AFAIK, ATF never objected.
Then, once trusts were accepted by ATF, folks started posting on internet forums about how they created the Joe N. Blow Revokable Living Trust of Anywhere, Florida, and then engraved "JNBRLT/AW FL" on their NFA items. News flash: ATF reads these forums. And so ATF started requiring trusts to engrave the entire trust name on the firearm.
It seems the second shoe has now dropped, and ATF now also wants individual Form 1 filers to also engrave their entire first name as well as the last name.
We have met the enemy, and he is us.
Also FWIW, I only know of two instances where ATF got involved in engraving issues. Both were for Form 1'd MGs, back when it was legal to Form 1 a machine gun. And in both cases, the Form 1 applicants had not bothered to engrave anything at all on their new MGs.
The results:
––In one case, where the applicant was not aware of the engraving requirement (this was before Al Gore invented the internet), ATF handed him a written notice that gave him 60 days to get the firearm engraved and submit photographic proof to the ATF office listed on the notice. He did so, sent it in, and never heard anything from ATF again.
––In the second case, where the applicant got into a shouting match with ATF because he believed he was not required by law to engrave, they seized his MG ... and about 6+ months later, shipped it back to him, engraved by Tech Branch.
I am not an attorney and this is not legal advice ... but I simply cannot conceive of a situation where improper engraving is a prosecutable offense. Worst case, ATF might take it and re-engrave it for ya ... but no jury in the world is going to convict anyone for incorrect engraving. Well, maybe in New York or Mass., but really ...
It is in every NFA owner's best interest to comply with the law, including engraving regs, to the best of their abilities ... but really, unless you do something to really piss off ATF, you're not going to jail or permanently losing your gun.
Again, just my take. YMMV.