Not sure if somebody else has pointed this out but the speculative Veden numbers are definitely wrong. We know from Shallan's flashbacks in WoR that at first Heleran is referred to as Nan Helaran (WoR Pg 269, ln 3) and Balat is referred to as Tet Balat (WoR pg 269, ln 5). Before Helaran is presumed dead, Jushu is called Van Jushu, and she says he's her fourth brother, the youngest (WoR pg 336, ln 20). 'Four years ago', Balat has become Nan Balat 'as if he were the oldest', as Helaran is presumed dead (WoR pg 451, ln 29). We know that Wikim is older than Jushu (WoR pg 454, ln 36), and after Balat becomes Nan Balat we know Jushu becomes Asha Jushu and Wikim becomes Tet Wikim (WoK pg 174, ln 33). All of this means the oldest son is Nan ___ , then Tet, then Asha, then Van. Assuming OP is correct and Nan lines up with Nan, the number 2 in Alethi, Tet would be 3 and Asha 4, not the other way around.
TLDR: In your numerals translation in Veden the number 3 should be Tet, not Asha, and 4 should be Asha, not Tet.