Earliest art in FA main gallery (on 2019 June) doesn't have artist name on it. (FA 8850638 )

1st name on art (in main FA gallery): "Sinful Whispers 15" written on art, starting circa Sept 18, 2012 (FA 8865377 )
until circa Dec 24th, 2012 (FA 9538229 )

2nd name on art (in main FA gallery): "Sin15" (with logo) printed on art, starting circa Feb 23, 2013
(FA 9989431 )
until circa Jan 2nd, 2014 (FA 12398417 )

(Big watermark "(c) SinfulWhispers.deviantart.com" for two uploads on Sep 14th, 2013: FA 11597220 and FA 11597411 )

3rd(?) name on art (in main FA gallery): printed "SINFULWHISPERS15" on art from
circa Jan 5th, 2014 (FA 12425639 )
until circa June 1st, 2018 (FA 27524060 )
(plus Oct 29, 2018 (FA 29200578 )

4th name on art (in main FA gallery): switched to writing "Sinful 15" ("SIN"/"FUL"/"15") on their art,
starting around June 8th, 2018 (FA 27600166 ) up til their latest upload in main FA gallery (noted 2019 June 11)