Confelicity

Con + felicity.
 
The word felicity appears in English in the late 14th century meaning happiness; that which is a source of happiness. The word felicity has its origins in Old French felicite (happiness) and Latin felicitatem (happiness, fertility) and Latin felix (happy, fortunate, fruitful, fertile).
 
The proper names Felix and Felicia are from Latin felix (happy).
 
These origin words in turn have their source in Proto-Indo-European dhe(i) (to suck, to suckle, produce, yield). Such origins suggest that that which brings happiness is that which produces crops and food.
 
The verb felicitate, from the 1620s, means to render happy. To felicitate, meaning to congratulate or to compliment on a happy event, is from the 1630s.
 
The Latin word-forming element con- means together, with.
 
So con + felicity means to be happy together—confelicity.
 
Is felicitator a word?! That is, is a felicitator someone who facilitates happiness in themselves and others?
 
Reference: Online Etymological Dictionary, https://www.etymonline.com/