BUZZ-Abu Dhabi's Union National Bank rises after Q1 earnings

May 1 (Reuters) - ** Shares in Union National Bank rise 2.2 percent to 3.65 dirhams ** Bank posted 27 percent drop in first-quarter net profit attributable to equity holders to 447 million dirhams ($121.76 million); two analysts polled by Reuters had forecast 314.00 million dirhams and 454.30 million dirhams ** Other Abu Dhabi banks remain weak after disappointing first-quarter earnings last week; First Gulf Bank down 1.2 percent, Abu Dhabi Commercial Bank loses 2.3 percent ** Abu Dhabi stock in