One thought: When you used the word trigamy, did you mean bigamy?.    From Wordnik.com.  [Original Signal - Transmitting Buzz] Reference

Basil calls trigamy, polygamy, and quoting Gregory of Nazianzus (Orat. 31) as calling a third marriage paranomia.    From Wordnik.com.  [NPNF2-08. Basil: Letters and Select Works] Reference

So bigamy, trigamy, and quadrigamy are now legal in Britain.    From Wordnik.com.  [On Thursday, the Legg report will be published along with...] Reference

A mistake in taste for which the wisdom of the future will adjudge a punishment called trigamy.    From Wordnik.com.  [The Volokh Conspiracy » Libertarian Squishiness:] Reference

Maxim weathered court cases that accused him of misdeeds ranging from patent infringement to trigamy.    From Wordnik.com.  [The Gun] Reference

There is no law as to trigamy: a third marriage is not contracted by law.    From Wordnik.com.  [NPNF2-08. Basil: Letters and Select Works] Reference

In cases of trigamy we have accepted a seclusion of five years, not by the canons, but following the precept of our predecessors.    From Wordnik.com.  [NPNF2-08. Basil: Letters and Select Works] Reference

Whether it was, that, if trigamy should come into fashion, there would be three times as many chances to enjoy the luxury of saying.    From Wordnik.com.  [The Professor at the Breakfast-Table] Reference

In the case of trigamy and polygamy they laid down the same rule, in proportion, as in the case of digamy; namely one year for digamy.    From Wordnik.com.  [NPNF2-08. Basil: Letters and Select Works] Reference

Admittedly, it's highly unconventional, and the sheer psychology of mere trigamy is highly complex; you have to be special to make a polymarriage work.    From Wordnik.com.  [Original Signal - Transmitting Buzz] Reference

Balsamon understand by polygamy a fourth marriage; trigamy being permitted (cf.    From Wordnik.com.  [NPNF2-08. Basil: Letters and Select Works] Reference

It would be not bigamy but trigamy.    From Wordnik.com.  [History of English Humour, Vol. 2 (of 2)] Reference