Onno Ydema

Attorney in Amsterdam, Netherlands
Onno Ydema focuses his practice on litigation and corporate law, with an emphasis on international arbitration and cross-border litigation. His clients range from mid-size to large (internationally and locally operating) companies active inter alia in information and communication technology, as well as in the engineering and construction industries. Onno is a well-known author on divorce law, engaged by some of the top 500 wealthiest industry leaders in the Netherlands. He is also active as an honorary judge in the Court of Appeals in The Hague.

Areas of Concentration
•Commercial dispute resolution (litigation and arbitration)
•International and national arbitration
•Corporate law
•Mergers and acquisitions
•Family law

Awards & Recognition
•Team Member, The Legal 500 United States, Top Tier Firm in Real Estate, 2013
•Team Member, a Law360 Real Estate Practice Group of the Year, 2011 and 2012
•Member, Winning Team, Chambers USA Award for Excellence, Real Estate, 2010

Articles, Publications, & Lectures
Onno has authored numerous articles on tax law and family law. He regularly lectures at congresses, such as those organized by the law departments of the Free University of Brussels, Cambridge and UCLA, and at the annual lecture at the law departments of the University of Gent and Maastricht.

Associated News & Events
Press Releases
Greenberg Traurig Real Estate Practice Selected as a Practice Group of the Year by Law360
Greenberg Traurig Takes Top Honors in Real Estate from Prestigious Legal Ranking and Publication Chambers and Partners USA

+31 20 301 7327
Client Rating N/A help_info
Submit a client review

Peer Rating N/A help_info

Areas of Law

  • Corporate & Securities
  • Litigation and Arbitration
  • Real Estate
  • Mergers & Acquisitions


Experience & Credentials


Of Counsel

Admission Details

Admitted in 1996, The Netherlands

Credit Cards Accepted
American Express
Law School Attended

University of Leiden, Netherlands
Class of 1990

University Attended

University of Leiden, Netherlands
Class of 1990

University of Leiden, Netherlands
Class of 1997

Birth Information

Born in 1958
February 4, 1958


Dutch; English; French; German

Associations & Memberships

Professional & Community Involvement
•Visiting-Professor, Law Department of the Erasmus University in Rotterdam, 2003-2013
•Hon. Judge, Court of Appeals in Th... More

Bar Fellowship

Dutch Meijers Institute for Legal Research, 2001-Present

•Editor, Yearbook on Divorce Law for Judges and Attorneys, 1997-Present

•Professor, Law Faculty of the University of Leiden, 1997-Present

•Member, Dutch Bar Association

Representative Cases

Significant Representations: Represented Russian steel factory and its prime shareholders in a dispute with an off-shore company in the British Virgin Islands.Represented international company active in engineering software for Geographic Information Systems in an M&A project and in contract law issues.Represented company active in the development ... More

Contact Information


+31 20 301 7327


+31 20 301 7350


Send email to Onno Ydema

Greenberg Traurig, LLP (Amsterdam, )

About Client Rating
About Peer Rating

Welcome to Martindale-Hubbell® Client Review, a new ratings service that allows you to view and provide feedback on a lawyer or law firm on service and relationship qualities such as Communication Ability, Responsiveness, Quality of Service, and Value for Money.

Determining a Rating

The Client Review Rating is determined through aggregation of validated responses. This compilation of Client Reviews translates to a numerical rating and associate descriptive term on a scale of 1 -5. 1 being lowest as "Rated" and 5 being highest as "Preeminent".

  • 4.5-5.0 Preeminent
  • 3.0-4.4 Distinguished
  • 1-2.9 Rated

Martindale-Hubbell uses a third-party resource to validate that the respondent is a living person, but cannot confirm the lawyer/client relationship, which in many cases is confidential. Clients must affirm that they are a client of the lawyer or firm identified for review at the time of the completed Client Review.

The Reviewers

Those who complete Client Reviews are clients of law firms who hired a lawyer within the last year, whose matter is not pending, and want to share their experience of that lawyer or law firm with other potential clients. Reviewers can be of any type from in-house counsel, corporate executives, small business owners to private individuals, and even sometimes another lawyer in a different jurisdiction.


Client Reviews are anonymous and reviewers' identities are not published; however a summary of basic demographics will be part of the display of responses.

Why do we collect demographics as part of the review?

Those who are researching a lawyer or law firm like to see that there are other clients who might be "like them". This is valuable information contributing to the decision-making process of hiring a lawyer.

Martindale-Hubbell's role

Martindale-Hubbell facilitates the process of Client Review by gathering responses, validating them and aggregating results for display online. The content of the responses are entirely from reviewers, the clients of the firm or lawyer.

It is important to note that Martindale-Hubbell does not undertake to develop Client Reviews for all firms and lawyers. Therefore, the fact that a firm or lawyer has not been reviewed should not be construed unfavorably. Prior results do not guarantee a similar outcome and Martindale-Hubbell accepts no responsibility for the content or accuracy of any review over which Martindale-Hubbell exercises no editorial review or control.