What do I name an infant that lived 10 hours in order to seal him to his parents?
Welcome to the "Community.FamilySearch" Forum.
I am just another 'lowly' User/Patron ...
[ And, I happen to be a Member of the Church ... ]
Just in passing ...
IF, the Infant was NOT given a any FIRST Name(s); THEN, ...
Short Answer: NOTHING in the "First Names" Field, simply LEAVE that field; as, BLANK ...
NOTHING is required; and/or, need. in the "First Names" Field, in such cases.
ONLY a 'Family Name' / 'Surname' is required; and/or, need, in the "Last Names" Field.
I hope, that this may help/assist, somewhat.
An unnamed infant, that DOES NOT have a 'Given' [ie. "First Name(s)"], DOES meet the requirements (of course, provided, they have a 'Family Name'/'Surname') for "Temple" Work; and, is NOT precluded, from receiving "Temple" Work.
All that is NEED, is a 'Family Name'/'Surname' ...
The use of the "Word", of "Infant" (or, the like), should NOT be included/appear, in the "First Names" Field, for such that are "unnamed"; as, such is NOT a name, merely, a way to reference the unnamed infant, in contextual sense.
Once the 'Words', such as "Infant" (and/or, the like), is REMOVED, from the "First Names" Field; and, that Field left "Blank" (plus, NOTHING in the "Title" Field); the, the "Temple" Work, WILL / CAN be able to be "Requested".
Please be aware, that when the "Temple" Cards are printed, for such an "Unnamed" Child/Infant, the "System" AUTOMATICALLY includes/adds, Mr. or Miss to the name, on the "Temple" Card, for "Temple" Work purposes.
Here is a "Knowledge Article", in 'FamilySearch':
Where is states, among other things
Sometimes you need to perform ordinances for someone whose name is not known.
If you cannot find the name of a person but still want to have temple ordinances performed, enter the information below into the Name field:
When the cards are printed, Mr. or Miss is added to the name.
Here is another "Knowledge Article", in 'FamilySearch', that references "Words", that DO NOT actually form part of a Child's/Infant's actual "Name"; and, should NOT be used - eg. "Infant".
I hope, that this further information, may also help/assist; and, also provide some additional, insight; and, perspective.