On this page,
I found this copy of an obituary notice for Ella.
I actually bookmarked that in an old folder of genealogy stuff I'm collecting. Based on the text in the obit, it does not appear they had any kids.
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https://www.ancestry.com/1940-census/usa/Missouri/Ella-P-Arconati_31x78f
https://www.findagrave.com/memorial/39110793/ella-p.-arconati