A quick function you can add to your .zshrc or .bashrc to close all screens with a certain name, even if multiple screens exist with the same name

killscreens.sh

# killscreens()
# close alls screens with name
# based on answer by joschi from question here https://unix.stackexchange.com/questions/20435/killing-multiple-gnu-screen-sessions-with-the-same-name
#
# [ USAGE ]
# killscreens <screen-name>         Kill all screens with name
# killscreens -h                    Displays help menu
killscreens() {
    if [[ "$1" == "" || "$1" == "-h" || "$1" == "--help" || "$1" == "help" || "$2" != "" ]]; then
        echo "Usage: killscreens <screen-name>"
        return
    fi
    for session in $(screen -ls | grep -o "[0-9]*\.$1"); do screen -S "${session}" -X quit; done
    echo "killed all screens with name $1."
}