I installed Garamond Font-family on ubuntu 16.04 server , tested on a webpage using Apache and it worked fine.

I created a report to use the Garamond font , but did not change the font.

<template id="new_quotation">
    <t t-call="report.html_container">
       <t t-foreach="docs" t-as="doc">
    <!--<t t-set="doc" t-value="doc.with_context({'lang':doc.partner_id.lang})" />-->
    <div class="page" style="font-family:Garamond;font-size:16px;">
        <div class="oe_structure"/>
        <div class="row">
            <div class="col-xs-6">
                <strong t-if="doc.partner_shipping_id == doc.partner_invoice_id">Invoicing address:</strong>
                <!--<strong t-if="doc.partner_shipping_id != doc.partner_invoice_id">Invoicing address:</strong>-->
                <div t-field="doc.partner_invoice_id"
                    t-options='{"widget": "contact", "fields": ["address", "name", "phone", "fax"], "no_marker": True, "phone_icons": True}'/>
                <!--<p t-if="doc.partner_invoice_id.vat">VAT: <span t-field="doc.partner_invoice_id.vat"/></p>-->
                <!--<div t-if="doc.partner_shipping_id != doc.partner_invoice_id" class="mt8">-->
                    <!--<strong>Shipping address:</strong>-->
                    <!--<div t-field="doc.partner_shipping_id"-->
                        <!--t-options='{"widget": "contact", "fields": ["address", "name", "phone", "fax"], "no_marker": True, "phone_icons": True}'/>-->
                    <!--<p t-if="doc.partner_shipping_id.vat">VAT: <span t-field="doc.partner_shipping_id.vat"/></p>-->
                <!--</div>-->
            </div>