The Order is originally called
ORDEN DE LA JARRA (or TERRAZA).
(Melczer translates JAR)
It was founded in the honour of
SANTA MARIA DEL LIRIO,
NUESTRA SENORA DE LA FLOR DE LIS
For further information about the origin of the symbol
see MARY´S SYMBOL
Here is a link to Wikipedia describing
the Orden de la Jarra (in Spanish):
1751 a POTTEN product from Hörstgen ( Lower-Rhine, Germany) - their traditional tree of life symbol with lily -
reminding of the symbol of the order
SPAIN/GALICIA
Potino family
SPAIN/NAVARRA 1040
After a Marian vision (for its symbol see: Wikipedia above)
King Garcia Sanchez founds the Orden de la Jarra, the first Military Knight Order of Spain (with later members in all Europe)
The Spanish POTIZ/POTIN family adopts in Rioja the widely-spread symbol ("JARRA" and "POTIN" both mean "water jug")
SPAIN/ASTURIAS 1400
The town of Siero takes the symbol as coat of arms
ANTWERP 1600
A Protestant type of peasant lace called "POTTEN KANT"
uses the symbol, but leaves out the Marian lily !
FRANCE 17/18th century
Two POTIN/POTTIN coat of arms use the symbol with lily
GERMANY 1751
First occurence of symbol with lily on POTTEN earthenware
(although they are Protestants).
They use it through three generations.