That of St. Patrick (Ireland) is a similar cross in red on a white ground.
"Amusements in Mathematics" by Henry Ernest Dudeney
The diagonals will be the centre and dividing lines of the crosses of St. Andrew and St. Patrick.
"Ontario Teachers' Manuals: History" by Ontario Ministry of Education
In the burial-ground outside is the famous Cross of Cashel, with a sculptured effigy of St. Patrick.
"The Sunny Side of Ireland" by John O'Mahony and R. Lloyd Praeger
You will notice that St. Andrew's cross is arranged so as to come above St. Patrick's in the two quarters of the flag next to the flag-staff.
"Chatterbox, 1906" by Various
St. Patrick made the sign of the cross over the cup and drank it, and nothing happened.
"Stories of the Saints by Candle-Light" by Vera C. Barclay
It is formed of a combination of the crosses of St. George (England), St. Andrew (Scotland), and St. Patrick (Ireland).
"Little Folks (October 1884)" by Various
The national flag of the British empire is the Union Jack, in which are combined in union the crosses of St George, St Andrew and St Patrick.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 4" by Various