WHY IS MY TORCH BULB CALLED LES & NOT TYLER OR CHARDONNET?

Had a query today from Finland about small Edison Screw bulbs, so, I thought I would supply interested parties with a listing of all ES bulb sizes so now you know why a bulb's name is MES or LES instead of DAVE or TYLER - Katie Hopkins, I love her, don't you - wonder what she would make of the Mullard Magic mug? 

DesignationBase diameter (thread external)NameIEC 60061-1 standard sheet
E5 5 mm Lilliput Edison Screw (LES) 7004-25
E10 10 mm Miniature Edison Screw (MES) 7004-22
E11 11 mm Mini-Candelabra Edison Screw (mini-can) (7004-6-1)
E12 12 mm Candelabra Edison Screw (CES) 7004-28
E14 14 mm Small Edison Screw (SES) 7004-23
E17 17 mm Intermediate Edison Screw (IES) 7004-26
E26 26 mm [Medium] (one-inch) Edison Screw (ES or MES) 7004-21A-2
E27 27 mm [Medium] Edison Screw (ES) 7004-21
E29 29 mm [Admedium] Edison Screw (ES)  
E39 39 mm Single-contact (Mogul- in America) Goliath Edison Screw (GES) 7004-24-A1
E40 40 mm (Mogul) Goliath Edison Screw (GES) 7004-24