I don't know what kind of data you want to use it for.
I don't know when you want to use it.
There is no default setting for column names to be named as such.
That's all I can tell you.
library(tidyverse)
bind_list <- expand_grid(one = LETTERS,two = LETTERS) %>%
mutate(bind = str_c(one,two)) %>%
pull(bind)
names_list <- c(LETTERS,bind_list)
names(your data) <- names_list[1:ncol(your data)]
I created this example.