Do you like this way of doing things?
It would be helpful if you could create your own data for me next time.
# your own data
# change names
names(df)<- c("Babacar Thiombane", ......)
# use rename
df %>% rename("Babacar Thiombane"=BABACAR.THIOMBANE)
As you may know, it is not advisable to enter spaces or dot signs in the column names of R.
It can cause bugs.
The various packages of R do not support such column names.
Try using janitor::clean_names() to find out the best names.