"We thought she’d turned herself invisible .... We knew it was against the rules, so we got a little bit annoyed."
-- Matilda Dukelow interviewed by the Daily Prophet (DP4)
Matilda Dukelow was a fan of the Holyhead Harpies Quidditch team (DP4).
Matilda saw Puddlemere United chaser Wilda Griffiths disappear during a match against the Holyhead Harpies and assumed the Chaser had turned herself invisible, which is against the rules. As reported in the Daily Prophet, it took a while for Matilda to realize that Wilda had been kidnapped (DP4).
Matilda is a popular girls name from the Gothic/High German mahta ("might, strength") and hildr ("battle"). The heroine of one of Roald Dahl's books is a "Matilda" and it was also the first name of Empress Matilda, the daughter of King Henry I of England, mother of King Henry II and unsuccessful claimant to the English throne in her own right
-- extracted from Wikipedia
Dukelow is a surname of French origin which came over into England after the Norman Conquest in 1066. It's meaning is thought to derive from the combination of du ("of the") and clos ("vineyard")
-- extracted from the Internet Surname Database
Although the date printed on the Daily Prophet Newsletter DP4 is 1 October 1999, the timeframe for that event is 1992-1993.