Man pages matching name jackd in section 1:

jackd.1.en	debian 10 / jackd1
jackd.1.en	debian 10 / jackd2
jackd.1.en	debian 11 / jackd1
jackd.1.en	debian 11 / jackd2
jackd.1.en	debian 12 / jackd1
jackd.1.en	debian 12 / jackd2