[citation needed] Another possibility is the 6th- or 7th-century Saint Iestyn, who is said to have been the son of Geraint ab Erbin, a ruler of Dumnonia.

[citation needed] In 1478 William of Worcester found that the church was believed to contain the bones of Justus of Trieste.

Bosworlas, in St Just parish, was said by Henry Jenner to have been named as 'the Dwelling of Gorlois' after Gorlois, the legendary duke of Cornwall, who he believed was a real fifth or sixth century figure, either a petty chief and vassal of the Royal House of Dumnonia, or of the line of the original chiefs of the Dumnonii if the kings of Dumnonia were the leaders of the Britons displaced by the Saxons.

The town also suffered from the decision of the Great Western Railway to abandon its plans to make St Just the terminus of the London mainline to Cornwall.

St Just was originally part of the Penzance Poor Law Union until 1894 when it was incorporated into the West Penwith Rural District.

[14] St Just is home to the popular Lafrowda festival[15] a seven-day community and arts celebration usually held in mid July.

Feast celebrations were moved to the Sunday nearest to All Saints' Day in 1536 following an Act of Henry VIII which means it usually take place at the end of October / beginning of November.

A description of St Just Feast, from 1882, follows:[citation needed] "Rich and poor still at this season keep open house, and all the young people from St. Just who are in service for many miles around, if they can possibly be spared, go home on the Saturday and stay until the Tuesday morning.

A small fair is held in the streets on Monday evening, when the young men are expected to treat their sweethearts liberally, and a great deal of "foolish money" that can be ill afforded is often spent" St Just also has a 'Plen an Gwarry' (Cornish for "playing place"), locally pronounced 'Plain an Gwarry'.

St Just's Plen an Gwarry occasionally hosts productions of the Cornish Ordinalia mystery plays.

[17] St Just has a healthy artistic scene, including the painter Kurt Jackson who has made several television appearances.

The children's animated television series Jungle Junction is produced by Spider Eye Productions of St. Just.

[27] Thomas White from St Just was the original trainer of Jack Carkeek, in the US, who became world Cornish wrestling champion.

[29] Only 5 miles (8 km) from Land's End, St Just claim to be the most westerly ECB Premier League club in the country.

[30] Most notable is the clubs significant success record, with 10 championship titles won in the Cornwall Cricket League since 1990.

[35] The town is also twinned, in partnership with Penzance, with Bendigo in the State of Victoria, Australia and with Nevada City in California, USA as a result of the historical links through the many people from the area who emigrated to the two destinations, mostly in the late 19th century, to find a better life in the mines there.