Although there appears to be many variants to the spelling of his name, Delalande seems to be the way the family wrote it, but a recent scholarly work has it as De Lalande.
BELGIAN TENOR LÉON CORDIER CDR
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*LÉON CORDIER*
He made his debut in the 1896–1897 season in Verviers, Belgium, then went
to the Netherlands and mainly appeared at the Konin...