Where does “Dickie” come from?

Dickie comes from English Dick with the diminutive suffix English -y, from Middle English -y, from Middle French -ie, from Latin -ia, ultimately from Proto-Indo-European -kos, a suffix forming diminutives and descriptive adjectives.

Ancestry of “Dickie”, step by step

Step	Language	Word	Meaning
1	English	Dick	—
2	English	declaration	A written or oral indication of a fact, opinion,...
3	Middle English	declaration	—
4	Old French	declaration	—
5	Latin	declaratio	The act of making clear; a disclosure,...
6	Latin	-tiō	—
7	Latin	dissertātiō	—
8	Latin	dissertus	arranged, disposed; explained
9	Latin	disserere	second-person singular future passive indicative...
10	Latin	dis-	asunder, apart, in two; reversal, removal;...
11	Latin	calceus	shoe
12	Latin	calx	limestone; chalk; the finish line
13	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

Every word from Ancient Greek χάλιξ →