"Sruthán" (stream) was mistakenly cited by Thomas O'Connor in the Ordnance Survey Letters in 1837, and adopted as the Irish form of Straffan. Seosamh Laoide used it in his list of Irish names of post-offices published in Post-Sheanchas (1905). "An Sruthán" gained currency among those involved in the Irish revival and was promoted as name in the local schools. Recent research by Domhnall mac Giolla Easpaig declares it "completely at odds with the written evidence cited above and with local pronunciation and appears to be no more than an "ad hoc" explanation of the name by O'Connor's informant." "Sruthán" is anglicised struffaun in some parts of the country. One would not expect to find it rendered thus in the Straffan area."