Hi David,
in my opinion, the closest parallel for EVA:y y is the well known Latin abbreviation that looks like a 9 and typically reads "cum-/con-" as a prefix and "-us" as a suffix.
One could make a similar, or possibly stronger, argument for EVA:d d that looks like an 8.
I believe both symbols are meant to have a phonetic value (or possibly different phonetic values depending on context). I don't think they have any particular connection with Arabic numerals, but I am open to the possibility that whoever invented the alphabet also used Arabic numerals for inspiration, together with Latin characters and Latin abbreviations.
in my opinion, the closest parallel for EVA:y y is the well known Latin abbreviation that looks like a 9 and typically reads "cum-/con-" as a prefix and "-us" as a suffix.
One could make a similar, or possibly stronger, argument for EVA:d d that looks like an 8.
I believe both symbols are meant to have a phonetic value (or possibly different phonetic values depending on context). I don't think they have any particular connection with Arabic numerals, but I am open to the possibility that whoever invented the alphabet also used Arabic numerals for inspiration, together with Latin characters and Latin abbreviations.