Suspicious wikilinks to surname pages

SQL

SET STATEMENT max_statement_time = 60 FOR
SELECT pl_from_namespace,  page_title
FROM templatelinks TL1
JOIN pagelinks PL1 ON pl_from = tl_from
JOIN page ON page_id = pl_from
WHERE tl_namespace = 10 AND tl_title = "Surname"
AND pl_namespace = 0
AND pl_from_namespace IN (0,6,10,14,100,828)
/*AND pl_title LIKE "B%"*/
AND NOT EXISTS (SELECT 1 FROM categorylinks WHERE cl_from = pl_from AND cl_to = "Surnames")
AND NOT EXISTS (SELECT 1 FROM templatelinks TL2 WHERE TL2.tl_from = pl_from AND TL2.tl_namespace = 10 AND TL2.tl_title = "Surname")
AND NOT EXISTS (SELECT 1 FROM templatelinks TL3, page, pagelinks PL2
                WHERE TL3.tl_from = PL1.pl_from AND TL3.tl_namespace = 10
                AND page_namespace = 10 AND page_title = TL3.tl_title
                AND PL2.pl_from = page_id AND PL2.pl_namespace = PL2.pl_namespace AND PL2.pl_title = PL2.pl_title)
ORDER BY pl_from_namespace, page_title
SQL

Checking query status...
