The closest “family” to LaCugna are the late‑20th‑century **social / relational Trinitarians** who tie Trinity tightly to salvation, church, and ethics, and who emphasize persons‑in‑communion over abstract substance.

### Most similar in style and concerns

– **John Zizioulas** – Develops a full **relational ontology** (“being as communion”) where hypostasis/person is constituted by relation, and human personhood and ecclesiology are mapped directly onto the triune communion.[1][2]
– **Jürgen Moltmann** – Stresses a **social Trinity** of mutually indwelling persons, critiques monarchical and substance models, and draws strong political/ethical conclusions about non‑dominating community and liberation.[3][1]
– **Leonardo Boff** – Reads the Trinity as a model of egalitarian, liberating community and uses social‑Trinitarian themes for base‑community and political praxis.[2][4][1]
– **Elizabeth Johnson** – Feminist trinitarian theologian who, like LaCugna, links Trinity, relationality, and liberation, and is frequently grouped with her in discussions of “relationality” and social Trinity.[4][2]
– **Colin Gunton & Robert Jenson** – Critique Western substance metaphysics, foreground **relation and history**, and are regularly named alongside LaCugna as modern Trinitarians who prioritize relationality over abstract simplicity.[5][2]

### Overlapping themes

These theologians, with LaCugna, tend to:

– Start from **God‑for‑us in history** rather than an abstract “immanent Trinity.”[6][4]
– Treat **relationality** as a key ontological category for speaking of God and human persons.[7][2]
– Use the Trinity as a **model for church and ethics** (mutuality, equality, non‑domination), not only as a metaphysical puzzle.[1][3][4]

If you’d like, I can sketch a small table comparing LaCugna with Zizioulas, Moltmann, and Boff on (1) economic focus, (2) relational ontology, and (3) social/ethical applications.

Sources
[1] Social trinitarianism – Wikipedia https://en.wikipedia.org/wiki/Social_trinitarianism
[2] Participation as a Trinitarian Virtue – University of Toronto Press https://utppublishing.com/doi/10.3138/tjt.14.1.7
[3] A Simple Case For the Trinity – by Clint Schnekloth https://clintschnekloth.substack.com/p/a-simple-case-for-the-trinity
[4] [PDF] The Trinity in Contemporary Theology: Questioning the Social Trinity https://ctsfw.net/media/pdfs/metzlerquestioningthesocialtrinity.pdf
[5] Incarnational Realism – Center for Barth Studies https://barth.ptsem.edu/incarnational-realism/
[6] Trinitarian Theology After Barth https://barth.ptsem.edu/trinitarian-theology-after-barth/
[7] [PDF] Understanding “Relationality” From A Trinitarian Perspective https://www.enochwan.com/english/articles/pdf/Relationality%20and%20Trinity.pdf
[8] The Relational Ontology of Augustine’s and LaCugna’s Trinity https://digitalcommons.csbsju.edu/obsculta/vol9/iss1/8/
[9] [PDF] REAL RELATIONS AND THE DIVINE – Theological Studies https://theologicalstudies.net/wp-content/uploads/2022/08/56.4.3.pdf
[10] God for Us – Uniting Church Australia https://uniting.church/god-for-us/
[11] Book God For Us by Catherine LaCugna https://www.stevethomason.net/2013/07/30/book-god-for-us-by-catherine-lacugna/
[12] Functional Unitarianism in Christian Theology – Facebook https://www.facebook.com/groups/209427593830583/posts/1392203662219631/
[13] A Cartoonist’s Guide to the Trinity https://cartoonistbible.com/featured/a-cartoonists-guide-to-the-trinity/
[14] A Feminist Critique of Monarchia in John Zizioulas’ Doctrine of the … https://love2justice.wordpress.com/2013/01/10/a-feminist-critique-of-monarchia-in-john-zizioulas-doctrine-of-the-trinity/
[15] [PDF] TOWARD A BIBLICAL MODEL OF THE SOCIAL TRINITY https://etsjets.org/wp-content/uploads/2010/06/files_JETS-PDFs_47_47-3_47-3-pp399-421_JETS.pdf