The fact that none of you has heard of the Indo-European family is astonishing. Variations of the word daughter can be found in Germanic, Celtic, Slavic, Iranian languages, Greek, Armenian and Sanskrit. All the above are more or less related, Indo-European languages. It is a heirloom.

Nope, it is a common Indo-European word. None borrowed it from someone else. İt is like a heirloom. İnherited from the past

You have overlooked two other Greek words related to “corner”:”corniza” and “honi”.

Hard to know, however, which came first. A little research to clarify this for your readers would be especially useful.

Constantinos Ragazas

ulcus, Ulysses,umbrella, ultimus, uncus, uncia, unio,universus, etc. Before you ridicule yourself check a Latin dictionary.
drvo or drevo is the same like Derek , derek(in turkish) and so many other variations of ΔΡΥΣ.