
There are references to clerics bearing the surname Agius in Malta in the 17th and 18th centuries. The oldest known substantive written account published by a person bearing the surname 'Agius' were from the linguist and historian Canon Gian P.F. Agius de Soldanis.
Probably his most famous work was that published by him in Rome in 1750. A copy of the frontispiece of this book is shown alongside. In it Agius describes the grammar of the Maltese language and presents his hypothesis as to the origins of the language from the Punic language of the Etruscans. (Incidentally the hypothesis was incorrect - but at least he raised interest in the subject!)
The surname 'Agius' appears frequently at the time of the French Occupation of Malta (1798 -1800). Thus one of the four physicians dealing with public health in the capital city Valletta and in the 'Three Cities' was Giovanni Agius. Amongst the soldiers fighting against the French occupation were Major Fredric Agius (who had been adjutant of the Valletta militia), Captain Guzeppi Agius, and Sergeant Felic Agius. The liberated portions of the Maltese islands elected representatives to a 'National Congress' - the chairman of the assembly was Judge Dr Luigi Agius, while one of the secretaries was Giovanni Battista Agius. (C.J.Boffa 1998). Earlier still, in Wettinger's account of the Militia List of 1419-1420, the surname appears to be listed as Haiuz.
An eminent cleric by the name of Agius was the prelate Archbishop Ambrosio Agius, titular archbishop of Palmira who was assigned papal legate to the Philippines in 1901, by Pope Leo XIII. He had been a member of the Benedictine monastery of Monte Cassino.
In heraldic terms, the blazon of arms has been described as:
'Azure; upon a mountain of three, argent, a griffon salient or,
crowned
of the same and holding in pale a sword of the second with crosspiece
and
grip of the third and in chief dexter a mullet of six points or'.

A model made by Thomas to depict the 'Agius' surname crest or arms, adapted from Warhammer (R) appears below:

A
sealing wax impression of an 'Agius' signet ring appears alongside on
the
left.
There is a Greek word agios (spelled alpha-gamma-giota-omicron-sigma) which means saint, and so some have suggested that the Maltese surname Agius is of Greek origin meaning 'saintly' or 'holy' or "deserving of honour". The surname Agius thus could have been a nickname describing someone of high morals or who was very pious.
However there is no direct evidence for this as far as can be made out, and Arabic origins have been mooted; for example one version is that 'Agius' meant something like an old man or a wise old woman (in Arabic). As far as is known the Italian surname agus, sardinian place name aggius and maltese surname agius are unrelated.
In the Malta telephone directory, about 1.3% of the entries relate to the surname 'Agius'.
It is difficult to tell how many people bear the surname of 'Agius' worldwide- perhaps to the order of about ten thousand.
The following are links to various World Wide Web sites related to 'Agius':
Searching for Agius ancestors
'Agius' is a relatively common surname in Malta. So if your surname is Agius it is unlikely that you will easily find a common ancestry with another 'Agius' who you may have come across at random.
If you did wish to search for your ancestors, start by getting Public Registry civil status certificates, including Birth, Marriage and Death through certificates online. Get the 'complete' certificates. Unfortunately at present this service will only provide birth certificates as far back as 1863 (which is relatively recent in genealogical terms). To go further back you would need to try other means such as the church registers of the parish(es) where your ancestors were born or present yourself in person at the Public Registry office in Valletta.
If you do not have the time and the knowledge that is needed, you might need to search for and engage the services of a genealogist.
The following web pages might also help.
Besides the sources cited above, Andreas-Albertos
Agius is thanked for information and advice.
While Mr C.Agius provided the following image:

This page was written by Raymond
Agius
(Copyright), and was last amended in May 2008