Man pages matching name pdb in section 4:

pdb.4.de	debian 10 / txt2pdbdoc
pdb.4.en	debian 10 / txt2pdbdoc
pdb.4.de	debian 11 / txt2pdbdoc
pdb.4.en	debian 11 / txt2pdbdoc
pdb.4.de	debian 12 / txt2pdbdoc
pdb.4.en	debian 12 / txt2pdbdoc