As you say, each family has it's words, and mine is no exception. But we come by it honestly, being related to William Archibald Spooner, who swapped consonants, etc between 2 words. ( https://en.wikipedia.org/wiki/Spoonerism )
My favorite made up words are liberry, for library. Runner up: pessghetti for spaghetti...
Spoonerism
A spoonerism is an error in speech in which corresponding consonants, vowels, or morphemes are switched (see Metathesis) between two words in a phrase. These are named after the Oxford don and ordained minister William Archibald Spooner, who was famous for doing this.
An example is saying "The Lord is a shoving leopard" instead of "The Lord is a loving shepherd." While spoonerisms are commonly heard as slips of the tongue, and getting one's words in a tangle, they can also be used intentionally as a play on words.
That is an excellent ancestor to have, you can blame slips of the tongue on your genetics as you please, lol!
I was at the liberry today, ha ha:)