She may have had a twin brother Thomas who sailed the same year to New England with her future husband, William. 
Some sources say her maiden name was Deacon. 
Avis may have been married to a Mr. Chapman.

Historical
1618-1638: Germany - The Bohemian Revolt precipitates the Thirty Years War which devastates Europe in the years 1618-1648
1618: China - The Manchus start Invading China, their conquest eventually topples the Ming Dynasty
1618: Romania - Bethlen Gabor, Prince of Transylvania, joins Protestant Rebels
1619: Austria, Romania - Bethlen Gabor is defeated outside Vienna
1620-1621: Poland, Turkey - Polish-Ottoman War over Moldavia
1620: Poland - Battle of White Mountain, Emperor Ferdinand II, Holy Roman Emperor, defeats the Bohemian rebels
1620: Romania, Turkey - Bethlen Gabor allies with the Ottomans and an Invasion of Moldavia takes place, the Polish suffer a disaster at Cecora on the River Prut
1620: United States - The Puritan Pilgrims arrive in the Mayflower at Cape Cod
1621: Poland, Turkey - The Battle of Chocim Poles and Cossacks under Jan Karol Chodkiewicz defeat the Ottomans
1621: United States - The Pilgrims celebrate the first Thanksgiving with their Indian neighbors
1622: United States - Jamestown massacre Algonquian natives kill 347 English settlers outside Jamestown, Virginia (a third of the population of the colony) and burn the Henricus settlement
1623: Italy - Maffeo Barberini is elected Pope Urban VIII at the Papal conclave of 1623
1624-1642: France - As chief minister, Cardinal Richelieu centralises power in France
1625: United States - New Amsterdam founded by the Dutch West India Company in North America
1626: Italy - St. Peters Basilica in the Vatican completed
1626: United States - The Dutch buy Manhattan Island for $24, a presence is established but no large settlements made
1627: France - Cardinal Richelieu lays siege to Protestant La Rochelle which eventually capitulates
1629: France - Cardinal Richelieu allies with Swedish Protestant forces in the Thirty Years War to counter expansion by Ferdinand II
1631: Italy - Mount Vesuvius erupts near Naples
1632: germany - Battle of Lutzen (first of two), death of king of Sweden Gustav II Adolf
1633: Italy - Galileo Galilei arrives in Rome for his trial before the Inquisition
1633: United States - The city of Baltimore is settled
1634: Ethiopia - Emperor Fasilides expels the Catholic Patriarch Afonso Mendes and several Jesuit missionaries from Ethiopia
1634: Germany - Battle of Nordlingen (first of two), in Bavaria, results in Catholic victory
1636: Ethiopia - Emperor Fasilides founds the city of Gondar, which becomes the capital of Ethiopia for the next two centuries
1636: United States - Harvard University is founded in Cambridge, Massachusetts
1636: United States - Roger Williams is driven from Puritan Massachusetts and settles Rhode Island, a haven for religious freedom
1638: United States - Delaware is settled by Peter Minuet