ダグダはトゥアハ・デ・ダナーンの王の一人である。トゥアハ・デ・ダナーンは、マイルズ人が来る前に、以前アイルランドに住んでいたフォモール族を征服した超自然的な存在である。モリガンはしばしば彼の妻として描かれ、娘はブリッグ<ref name=Moytura>Stokes Whitley, The Second Battle of Moytura , https://celt.ucc.ie/published/T300011/ |website=Corpus of Electronic Texts, University College, Cork, 3 August 2019</ref>、恋人はボアーン(ボイン川はこの名に因んでいるが、彼女はエルクマールと結婚していた)であった。フォモール族との戦いに先立ち、サムハインの日に戦いの女神であるモリガンと結婚し、戦いの計画と引き換えにしたのだ<ref name="CMT">''Cath Maige Tuireadh''. [http://www.sacred-texts.com/neu/cmt/cmteng.htm Trans. Elizabeth A. Gray].</ref><ref>https://www.britannica.com/topic/Dagda, Dagda | Celtic deity</ref>。
ダグダは、その大きな権力と威信にもかかわらず、尻をほとんど覆わない短くて荒いチュニックを着て、大きなペニスを地面に引きずる、と、おろかで粗野、滑稽でさえあるように描かれることがある<ref name="CMT" />。
Despite his great power and prestige, the Dagda is sometimes depicted as oafish and crude, even comical, wearing a short, rough tunic that barely covers his rump, dragging his great penis on the ground.<ref name="CMT" /> Such features are thought to be the additions of Christian redactors for comedic purposes. The [[Middle Irish|Middle Irish language]] ''Coir Anmann'' (The Fitness of Names) paints a less clownish picture: "He was a beautiful god of the heathens, for the Tuatha Dé Danann worshipped him: for he was an earth-god to them because of the greatness of his (magical) power."<ref name="CA">''[[Coir Anmann]]''. [http://www.maryjones.us/ctexts/fitness_of_names.html ] {{Webarchive|url=https://web.archive.org/web/20160303202314/http://www.maryjones.us/ctexts/fitness_of_names.html |date=3 March 2016 }}</ref>
The Dagda has similarities with the later harvest figure [[Crom Dubh]].<ref name="Crom"/> He also has similarities with the Gaulish god [[Sucellos]], who is depicted with a hammer and a pot,<ref name=koch/> and the Roman god [[Dīs Pater]].<ref name="ohogain"/>