Source? Sounds made up.
''from Greek hōra a word used to indicate any limited time within a year, month, or day, from PIE *yor-a-, from root *yer- "year, season"'' - https://www.etymonline.com/word/hour
The ancients would also divide the day or night into watches, which are of different length from hours, which became popular during the Roman Empire. The NT uses both.
The word Horoscope definitely comes from Greek (Horoskopos) and means Hour-Marker. This is the word for the Ascendant and is not used for a chart in Hellenistic astrology.
You're unaware of "the Eye of Horus"?