What is a minor kingdom?
Petty kingdom
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The earliest known kingdoms or tribes in Ireland are referred to in Ptolemy's Geography, written in the 2nd century. He names the Vennicni, Rhobogdi, Erdini, Magnatae, Autini, Gangani, Vellabori, Darini, Voluntii (identified as the Ulaid nation or Uluti tribe), Eblani, Cauci, Menapii, Coriondi and Brigantes tribes and kingdoms.