Dictionary of Medieval Names
from European Sources
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Indigo m. English indico, indigo from Latin indicum, Greek ἰνδικόν 'Indian', used to refer to blue Indian dye.

This word for the dye only came into use in England in the 16th C; it is extremely unusual to find it used as a given name.

England
Early Modern English
● 1598 Indigo DEmar-vol2 p. 39; 1599 Indigo ibid. p. 41
Cite as: S.L. Uckelman. "Indigo". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2023, no. 1. http://dmnes.org/2023/1/name/Indigo.