Llewelyn Lewellin was a clergyman and academic, the first principal of St David's College, Lampeter.

Lewellin was born the third son of Richard and Maria Lewellin, near Bridgend

Bridgend

Bridgend is a town in the Bridgend County Borough in Wales, west of the capital, Cardiff. The river crossed by the original bridge, which gave the town its name, is the River Ogmore but the River Ewenny also passes to the south of the town...

, Glamorgan

Glamorgan

Glamorgan or Glamorganshire is one of the thirteen historic counties and a former administrative county of Wales. It was originally an early medieval kingdom of varying boundaries known as Glywysing until taken over by the Normans as a lordship. Glamorgan is latterly represented by the three...

. He was educated at Cowbridge

Cowbridge

Cowbridge is a market town in the Vale of Glamorgan in Wales, approximately west of Cardiff. Cowbridge is twinned with Clisson in the Loire-Atlantique department in northwestern France.-Roman times:...

 Grammar School

Grammar school

A grammar school is one of several different types of school in the history of education in the United Kingdom and some other English-speaking countries, originally a school teaching classical languages but more recently an academically-oriented secondary school.The original purpose of mediaeval...

 and Jesus College, Oxford

Jesus College, Oxford

Jesus College is one of the colleges of the University of Oxford in England. It is in the centre of the city, on a site between Turl Street, Ship Street, Cornmarket Street and Market Street...

, graduating with a BA

Bachelor of Arts

A Bachelor of Arts , from the Latin artium baccalaureus, is a bachelor's degree awarded for an undergraduate course or program in either the liberal arts, the sciences, or both...

 in 1822, an MA

Master of Arts (postgraduate)

A Master of Arts from the Latin Magister Artium, is a type of Master's degree awarded by universities in many countries. The M.A. is usually contrasted with the M.S. or M.Sc. degrees...

 in 1824, a BCL

Bachelor of Civil Law

Bachelor of Civil Law is the name of various degrees in law conferred by English-language universities. Historically, it originated as a postgraduate degree in the universities of Oxford and Cambridge, but many universities now offer the BCL as an undergraduate degree...

 in 1827 and a DCL in 1829. Whilst studying at Oxford, he was ordained deacon

Deacon

Deacon is a ministry in the Christian Church that is generally associated with service of some kind, but which varies among theological and denominational traditions...

 in 1822 and priest

Priest

A priest is a person authorized to perform the sacred rites of a religion, especially as a mediatory agent between humans and deities. They also have the authority or power to administer religious rites; in particular, rites of sacrifice to, and propitiation of, a deity or deities...

 in 1823 by the bishop of Oxford

Bishop of Oxford

The Bishop of Oxford is the diocesan bishop of the Church of England Diocese of Oxford in the Province of Canterbury; his seat is at Christ Church Cathedral, Oxford...

. Lewellin was, in 1826, offered, and accepted, the headmastership of Bruton Grammar School, Somerset

Somerset

The ceremonial and non-metropolitan county of Somerset in South West England borders Bristol and Gloucestershire to the north, Wiltshire to the east, Dorset to the south-east, and Devon to the south-west. It is partly bounded to the north and west by the Bristol Channel and the estuary of the...

. Instead of taking this up, however, he went to Saint David’s College, (now the University of Wales, Trinity Saint David), as its first principal, in 1827, and held the post until his death at Lampeter, where he is also buried.