The Quagmire family is made up of Duncan, Isadora and Quigley (triplets) along with their parents, Mr. and Mrs. Quagmire. They originally lived in the Quagmire Mansion, and were very wealthy due to the Quagmire Sapphires. Their house was burnt down by a tremendous fire which killed both Mr. and Mrs. Quagmire. According to The Daily Punctilio, the Quagmire estate is currently under care of "the city's sixth most important financial adviser (Esme Squalor). It is unknown if Esmé still holds control of the estate due to the question of her survival in the burning of Hotel Denouement.
The definition of a 'quagmire' is another word for a mire, an unstable kind of liquefied soil similar to quicksand; however, it was more likely chosen as the surnames of the second extended family mentioned due to its extended meaning of 'a situation that is difficult to get out of'
- Mr. Quagmire (deceased)
- Mrs. Quagmire (married in to the family; deceased)
- Duncan Quagmire
- Isadora Quagmire
- Quigley Quagmire
- In the Netflix adaptation of A Series of Unfortunate Events, a mysterious husband and wife credited as only 'Mother' and 'Father appear throughout the season. For most of the episodes the audience are led to believe through various clues that they are the Baudelaire parents, having survived the fire and subsequently been kidnapped.
- In seventh episode of the series, after arriving at a door identical to the one that the Baudelaires wait on the inside of in the Lucky Smells Lumbermill, the parents are revealed to be the parents not of the Baudelaires but of the Quagmires, therefore identifying them as 'Mr. and Mrs. Quagmire'.
- Mrs. Quagmire is able to construct a grappling hook and a Molotov cocktail like Violet Baudelaire.