I must say that it is a bit troubling that neither of you seem to understand the term "first fruits" as it relates to the Scriptures.
Throughout the OT, the PRINCIPLE of "first fruits" was established with the sacrifice and offerings the folks had to make. Certainly, as I already stated, that at times it refers to the first born. BUT it is NOT the only and in fact may be less emphasized.
What was important was the BEST, the PRIMARY, the one without damage, the most HONORED of all that is brought.
For example, the first lamb may be (as Adam) damaged or in some manner unacceptable, so a more perfect sacrifice was offered from the second (Adam).
The first of Abraham (Ishmael) was unacceptable so the second (Issac) was selected to carry the promise.
The first of Jacob (Esau) was unacceptable so the second (Jacob) was selected.
Now, again, when it came to animals, because most born are without blemish, then the first one would be separated out and kept for later examination. However, should that one be unacceptable, another was selected. IT IS NOT birth order that is the primary focus, but the first AND best.
When it came time to harvest grains and other agriculture, it was not the first stalk, the first orange, the first plum, the first grape, but the best of the harvest which was called the first fruits and as such brought to the temple.
BTW,
@Van, This has nothing to do with Calvinism. You seem determined to use anything available against that view even when it is not appropriate.
Christ was not the first raised from the dead, but He was the first fruits (the primary focus) of all that would be in the harvest as seen in 1 Corinthians.
Again, much of the time the honor of family heritage fell to the first born in a family of the ancient eastern Mediterranean countries, BUT not always. And that is why one must also recognize that "first born" is NOT always the first born in a family, but the one who will carry the family responsibility and heritage.
Using the OT principle, OTHERS raised from the dead were not acceptable for the honor and able to carry the responsibility of family, but the Christ was and does.