And if two people of different ages are involved in a dispute, which district is used?
And what happens when someone gets married and changes their last name?
And a married couple who are not the same age. When they cross the age line, one spouse is in one district and the other spouse is in a different one?
What a mess it could be to have so many districts in one geographical area, and that would be needed across the whole country.
Or are you proposing a nation wide district for each category? Then where would the judges actually sit and what about people who are filing cases who live far away?
I could see that simply making things far more complicated.
“And if...changes their last name...not the same age”
The census data (names and ages) could (and should) be used.
1. Every person is counted (i.e. included in the census)
2. the citizenship of each person should be determined
3. states should be allocated districts based on citizenship as per Amendment XIV
4. districts are then created by the states
Every person has to be counted by the census (as per Amendment XIV) so their possible improper exclusion on the basis of male gender and race from the franchise can be determined.
The name, age and address (and as I recollect race) of every US resident is taken down too by the census.
Citizenship is best determined by other means than merely asking foreign citizens resident in the USA.
Asking citizenship on a census form would however make mistaken exclusion of citizens from Congressional district allocation easier to challenge.