In addition to NKX6–1 we found variants in WFS1, RFX6 and 7 other genes associated with monogenic forms of diabetes (AKT2, EIF2AK3, GLIS3, HADH, MNX1, NKX2–2, and PTF1A) and they may be relevant to development of MODY. The gene discussed is HADH; the disease is diabetes mellitus.