>> I know of no language currently which cannot indicate, refer to a sibling when that is intended, needed.<<
And we’ve not talking about a current language are we? So, therefore, if everything is in the scriptures, where does it say “Blood Brothers”?
I’ve said
in the root word meanings and in the context.
The translation used brothers for a reason.
It did not use uncles, cousins, best-mates or shoe-shine boys.
for a reason.