It looks as if all the vessels listed by Jolyn have been allocated names that are either unreported, have not yet happened or (most likely) they are a phantom naming system within the company. Note that the last two letters of each name are derived from the currently listed name - also the pdf datasheets were all created on 7/4/2010 (July or April?)
JOLEOD = ODODO (IMO 7528831/5NIZ5)
JOLEMA = probably CO-OPERATOR II (IMO 7392969) and renamed MADONNA [photo ACANTHA]
JOLEAC = ACANTHA (IMO 8120038/5NIZ4) [at Port Gentil 3/4/2012 as ACANTHA]
JOLEAN = possibly ANGEL (IMO 7818688)
JOLELJ = AUTUMN TIDE (IMO 7121102)[photo as "LADY J", unlisted]
JOLEMO = MORGAN (IMO 8311572/5NIZ2)[wrong photo]
JOLERO = ROBO (IMO 8224315)
JOLEST = JADE STAR (IMO 7368114)
JOLETI = TIFFANY (IMO 8207501)
Jolyn Marine Oil & Gas Services Ltd
http://jolynmarine.com/about_us.htmlalso known as Jadwils International Services Ltd
http://jadwils.com/about_us.html