An exclusively inorganic origin for the shapes has also been proposed.

Several possible origins for the English name "budgerigar" have been proposed:

Several possible origins have been proposed for the name, which appeared on local maps as early as 1774.

However, a Christian origin has also been proposed.

Extraterrestrial origin was first proposed in 1979, but not until 1993 was the impact structure finally confirmed.

As a result, some alternative origins for the Roman army's draco have been proposed.

Two possible origins have been proposed for the ceremony.

A number of words and names for which Etruscan origin has been proposed survive in Latin.

The origin has also been proposed as a corruption of diagonal or diagon.

Other origins of the name have been proposed without any real historical background.