HELOO

I think they are different with eachother since their fathers face is different.

I should negate what I said before only Evans father is visible in manhwa while Agust is not. They may have possibility being the same since both feature of their father is same black hair.

https://www.mangago.zone/read-manga/the_villainess_is_shy_in_receiving_love/uu/mk_chapter-63/pg-17/

Spoiler
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Ivan is the crying kid from the mana explosion incident who will later be taken care of by Jeremiah. And August is the illegitimate kid of the exiled prince. They are both different people. And Loretta will be paired up with Ivan.