Hi Whimlew,
The base AW109 has no marketing title or nickname, but the 109E was marketed as the 'Power' and in US Coast Guard Service it was designated the 'Stingray'. The 109S was marketed as the 'Grand'
The AW139 has no marketing title or nickname.
Many of these names are used by the OEM marking departments, and no where else. Good example is the S-92 'Helibus' which no-one in the industry ever, ever uses.