|Suggested Meaning:||‘peaty sluggish stream’|
|1st element:||Scots peat|
|2nd element:||Scots sike, syke ‘sluggish stream’|
|Blaeu Coila (1654):||No Entry|
|OS Name Books (1855-57):||Peat Syke|
A reference to the peaty nature of the sike.
The name appears as Peat Sike on the Ordnance Survey Map while the Ordnance Survey Name Book entry is Peat Syke.
A Sike or Syke is described as –
A small stream, rill or water-course, especially one that meanders through a hollow or across flat or boggy ground and is freqently dry in summerDictionary of the Scots Language 
the sheughs and the sykes
The Peat Sike flows into the Beoch Lane as does Mitchell’s Syke and Otter Sike.
| Dictionaries of the Scots Language |syke, sike|
| The Laird of Logan, Or, Anecdotes and Tales Illustrative of the Wit and Humour of Scotland|
|Reproduced with the Permission of National Library of Scotland|
|Map 1: Ordnance Survey 6 inch (1892-1960) |Peat Sike|