Voellus
Scholar who wrote on horology, tracing the etymology of "hour" from Hebrew through Egyptian to Greek.
Chapter I (The Six Days of Creation)
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Verse 14: Let There Be Lights in the Firmament
— Cited from Book I On Horology, ch. 1, for tracing the etymology of "hour"
"from Fr. Clavius our Voellus, book I On Horology, ch. 1, in the Scholia."