Contra Costa County Biography HENRY VAN TIENEN JANSSE Transcribed by Sally Kaleta, December, 2006. This file is part of the California Genealogy & History Archives http://www.rootsweb.ancestry.com/~cagha/index.htm Henry Van Tienen Jansse, one of the successful and prominent business men of eastern Contra Costa County, was born in Holland on September 4, 1878. His parents died in the old country when Henry was young. At the age of seventeen he began his independent career and came to America. He at once came to California and located in Santa Cruz, where his brother, Arie, was already living, but later removed to San Jose, where he is now engaged in the real-estate business. His brother Dirk is identified with Sloan & Co. of San Francisco; Peter, another brother, is in Santa Cruz County; and his brother John is a traveling salesman. The subject of this review received a limited education in the public schools, after which he attended business college in Santa Cruz. He understood farming in principle and detail and he readily found employment. Later he became associated with Silva & Omeara, of Oakley, in the grocery business, and after two years he purchased the interest of Mr. Silva. In June, 1914, Mr. Jansse and his partner purchased the general store of R. E. La Moine & Co., of Brentwood and incorporated both stores under the name of East Contra Costa Mercantile Company. Politically, Mr. Jansse is a Republican. Fraternally, he is a member of the Masonic lodge of Brentwood, and he is also a member of the Foresters. He was united in marriage to Johanna Agneta Rost Van Tonningen, a native of Holland, December 12, 1901. To this union there are three children - Helen, born January 22, 1906; Leonard, born October 10, 1909; Bernard, born February 14, 1911. The family are members of the Dutch Reformed Church of San Francisco. Mr. Jansse in his business has followed the policy of absolute integrity; his company has always lived up to the letter of all agreements, and this policy has won for it increased customers in both stores. Consequently, the company's standing is of the best, and its members are considered among the representative business men of eastern Contra Costa County. Source: "The History of Contra Costa County, California", Elms Publ. Co., 1917, p. 536.