I did not find anything about the history/etymology of Dulik surname anywhere on the Internet. I have traced my ancestors with "Dulik" surname upto 17xx and they all lived around here (Vlachovice, Ujezd, Slavicin) +- 30 km.
So here is my take about our surname origins, meanings and etymology.
In Czech Republic (EU), the surname "Dulik" is usual written as "Dulík" or "Ďulík".
The history of this name is unknown. It was already very common in 16xx when the registers of vital records ('matriky') were generally established.
The words 'Dulik/Dulík/Ďulík' do not have any meaning in czech language. The closest similar Czech word with some meaning is 'Dolík'/'Ďolík', which is a slang equivalent of 'důlek' (English: 'a dent on a surface', or 'a dimple in somebody's face').
As the Dulik word has no meaning in Czech (or any other slavic) languages, its origin might be foreign.
E.g., Duleek (/duːˈliːk/; Irish: Damhliag, meaning "stone house or church[2]") is a small town in County Meath, Ireland.
French surnames with similar pronunciation are: 'De Lix' (a record example from 1587), 'Delix' (example from 1571), 'Dalex' (1572) etc.
During the Austro-Hungarian empire period, the official language in Czechia was German and in some cases, the vital records registry books from that period transcribed "Ďulík" as "Diulik" (there is no 'Ď' in German language and 'Diu..' is the closest pronunciation-equivalent in German transcription).
Coincidentaly (?), (according to Google translator) in Malay, Filipino, Sundanese and Samoa languages (and possibly other languages in this language group), word "diulik" means "studied" or "educated". In Indonesian language it means "licked"
In old Greek language, the word "δούλα" ("doula") means "servant-woman", see https://en.wikipedia.org/wiki/Doula#History_and_etymology
This link explains also that the modern meaning of "doula" (in Czech language: "Dula") for "a trained companion who supports another individual (the doula's client) through a significant health-related experience, such as childbirth, ..." was first used in a 1969 anthropological study conducted by Dana Raphael.
So "dula"/"doula" as child-birth assitant is a very modern meaning = does not explain the Dulik surname origin.
Another similar word in Czech and Greek language is "tolik/τολικά", which means "Total(lly)"
All the information in this text was collected by me on June 23th 2021.
