Triple Cross
The Triple Cross shown on the left is the logo of the Lutheran Church - Missouri Synod, three-crosses-in-one, being a clear reference to the Holy Trinity. Each cross is the same size.
On the right is one of many varieties of crosses with triple bars, where a common interpretation for each bar is Faith, Hope and Charity. These crosses are also used to show high status of office, favoured by the pope and used in Freemasonry. (See Triple Bar Cross)
XXX
Three X's at the bottom of a letter or email mean three kisses. XXX is an abbreviation for "extra", as in extra-large clothing, extra-strong alcohol, and so on. It is also an abbreviation of Amsterdam, which has three St. Andrew's crosses in its flag and coat of arms. 'Triple-x' is a chromosomal abnormality, where a girl has a bit more female in each cell. And for conspiracy theorists, XXX is the number 666 in Kabbalistic gematria.
But none of the three X's in the above paragraph have much connection with the Christian cross. Kisses are very nice; extra-large clothing is essential for extra-large people; extra strong-alcohol is extra-bad for you; Amsterdam is the capital of Netherlands; chromosomes are little rods of nucleic acids that don't even look like X's; and the numerology connection is with the letter "X", not a cross.
None of the above has any religious association, with the possible exception of Amsterdam. But its three St. Andrew's crosses are a bit of an enigma because Amsterdam's patron is St. Nicholas.
Three Cruciforms
+Ephraim Fajutagana y Servanez
An example of Three Cruciforms is the pastoral staff carried by the Most Rev. Ephraim Fajutagana y Servanez, the 12th and former Supreme Bishop of the Philippine Independent Church (2011-2017).
It is a fretted cross and the two smaller ones represent the two thieves who were crucified with Jesus.
This style of Anchor Cross is another example.
