Today's name: Millicent
Potential nicknames: Mil, Millie, Milla, Milcie, Missy, Min, Minnie
Origin: Used since the Middle Ages, Millicent is Old French and was brought to England by the Normans in the French form of Melisent and Old Germanic form of Melisende, meaning "strong at work." Melisent and Melisende/Melisande came from the Old Germanic name Amalasuintha, which become Malasintha, and then Melisenda.
Popularity: Not in the top 1000 for at least 45 years, there were 67 baby girls named Millicent in 2010 and 64 in 2011.
Fun facts: (1) Dame Millicent Fawcet was an early British suffragist and feminist. Coincidentally, Millicent Preston-Stanley is an Australian feminist and politician, and another politician is Millicent Fenwick. (2) A double Harry Potter name: Millicent Bagnold, former Minister of Magic (another politician position, although fictional), and Millicent Bulstrode, a Hogwart's student. (3) A character in Sylvia Plath's "Initiation," a short story. (4) Barbie, the iconic doll's full name is Barbara Millicent Roberts. (5) Princess Amalasuintha, daughter of Theodoric the Great, King of the Ostrogoths. (6) Crown princess Melisande, later Queen of Jerusalem. Married to Fulk V le Jeune who reigned from 1109 to 1129.
I also happen to think Millicent would pair spectacularly with Winifred and Cyprian.