My family used Big K and Little K for that type of situation. It works for a dozen+ years before you have to figure something else out.
My family had Big Bill & Little Bill, Big Chris & Little Chris, Big Mike & Little Mike.
For further confusion, Little Bill was known to his friends as Jim, but known to the USArmy and USNavy as James.
Little Mike is now 52 years old. Little Chris is now 46 years old.
My father's second (and now third, long story) wife has the same first name as my mom, one spelled with an -i, one spelled with an -ie. When I was a kid they worked at the same place (an elementary school) so when I 'd call to talk to my mom, they'd say, "J LastName the teacher's aide?" and I'd go, "No, J LastName the Noon Duty."
My father's older brother was called by his middle name by our family, by his first name by his wife and by his last name by the rest of her family. My father - who had an odd name - was called "Jim" when he was in the Air Force and by a number of other people and by his initials by some of his co-worker/friends. Me? I go by my middle name - a family name which is also a man's name, so phone calls at work usually involve spending some time explaining that yes, that's my name - and spelling it - and yes, I'm a woman, so now can we get to why you called.
My family had Big Bill & Little Bill, Big Chris & Little Chris, Big Mike & Little Mike.
My mom's family has at least plurals of Michael, Kevin, Thomas, George, and even Ralph and Roger (though the Georges, Ralphs and Rogers are dead now). Same with my dad's family and William, Judy, and Connie (and "big" and "little" are used to distinguish the women, but not the Bills).
It feels like 50% of my husband's family is named "Anthony." He even has a sister named "Toni," who is married to another Anthony.
There are so many Anthonys, we call one "Jimmy." The problem is, Jimmy married a woman who was divorced from a Jim, and already had a son named Jimmy, so she calls our Jimmy "Tony." They've only been married for a few years, but when s-i-l talks about "Tony" to us, you can see our wheels turning until we figure out she means Jim. When she says, "Jimmy" she means her son. When she says, "Jim," she means her ex.
Oooh, interesting, Sparky1!
Empress Maria Theresa named all her daughters "Maria [middle name]". If it's good enough for the ruler of the Austro-Hungarian empire, why not for others?
I just found out that my niece has tested positive for COVID. She's in her mid-20s and reasonably healthy. I hope she'll come through it with no major complications.
I found out fairly late in life that my uncle Svetik went by Steve in the army and at his job. I didn't find out until his funeral that Svetik was a nickname for a longer name with only a few letters in common. And Babushka's second husband Arkady was called Mike out in the world, which I found out when I introduced him to my friend Mike at a holiday dinner and he said "oh, my name is Mike, too" and the whole family went "bwuh?"
My dads family had a lot of boys with the same names, so Big Mike and so on. I’m occasionally annoyed my name is so unique but it definitely is!
My family seems to have as little desire/energy to go Christmas shopping as I do. We are just giving presents to the pets.
I have two uncles that were Uncle Nicknames and then to find out they were known in later life jobs as real name and I can call them real name, but never Uncle real name. Butch and Skip ftr, Charles and Joe.