hecatarchyn.
/ˈhɛkətɑːki/ Government by a hundred rulers; = hecatontarchy n. (with play on Hecate n.).Apparently an isolated use.
ΚΠ
1884 R. D. Blackmore Hist. Sir T. Upmore II. xx. 273 Any other man, of any English era, from Heptarchy to Hecatarchy (that last child of Hecate).
This entry has not yet been fully updated (first published 1898; most recently modified version published online June 2021).
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n.1884